diff --git a/examples/mobc/CMakeLists.txt b/examples/mobc/CMakeLists.txt
index 185ad1798..6252613d9 100644
--- a/examples/mobc/CMakeLists.txt
+++ b/examples/mobc/CMakeLists.txt
@@ -58,7 +58,7 @@ add_definitions("-DGIT_REVISION_C2A_USER_SHORT=0x${GIT_REVISION_C2A_USER_SHORT}"
 
 add_subdirectory(${C2A_CORE_DIR})
 
-add_subdirectory(${C2A_USER_DIR}/Applications)
+add_subdirectory(${C2A_USER_DIR}/applications)
 add_subdirectory(${C2A_USER_DIR}/Drivers)
 add_subdirectory(${C2A_USER_DIR}/hal)
 add_subdirectory(${C2A_USER_DIR}/Library)
diff --git a/examples/mobc/src/src_user/Applications/app_headers.h b/examples/mobc/src/src_user/Applications/app_headers.h
deleted file mode 100644
index 96f1c7b06..000000000
--- a/examples/mobc/src/src_user/Applications/app_headers.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/**
- * @file
- * @brief Appのヘッダをまとめたヘッダ
- */
-#ifndef APP_HEADERS_H_
-#define APP_HEADERS_H_
-
-// Core
-#include <src_core/Applications/nop.h>
-#include <src_core/Applications/gs_command_dispatcher.h>
-#include <src_core/Applications/realtime_command_dispatcher.h>
-#include <src_core/Applications/timeline_command_dispatcher.h>
-#include <src_core/Applications/event_utility.h>
-#include <src_core/Applications/memory_dump.h>
-#include <src_core/Applications/telemetry_manager.h>
-#include <src_core/Applications/utility_command.h>
-#include <src_core/Applications/utility_counter.h>
-#include <src_core/Applications/divided_cmd_utility.h>
-
-// Core TestApp
-#include <src_core/Applications/TestApp/test_ccp_util.h>
-
-// DI
-#include "DriverInstances/di_aobc.h"
-#include "DriverInstances/di_uart_test.h"
-#include "DriverInstances/di_gs.h"
-
-// UserDefined
-#include "UserDefined/debug_apps.h"
-
-#endif
diff --git a/examples/mobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_debug_display.c b/examples/mobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_debug_display.c
index 91850d88b..08e5169f6 100644
--- a/examples/mobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_debug_display.c
+++ b/examples/mobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_debug_display.c
@@ -1,7 +1,7 @@
 #pragma section REPRO
 #include "tl_elem_debug_display.h"
 
-#include "../../../../Applications/app_registry.h"
+#include "../../../../applications/app_registry.h"
 #include "../../../../TlmCmd/block_command_definitions.h"
 
 #include <src_core/TlmCmd/block_command_loader.h>
diff --git a/examples/mobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_drivers_update.c b/examples/mobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_drivers_update.c
index fad4d6c90..d989aa165 100644
--- a/examples/mobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_drivers_update.c
+++ b/examples/mobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_drivers_update.c
@@ -1,7 +1,7 @@
 #pragma section REPRO
 #include "tl_elem_drivers_update.h"
 
-#include "../../../../Applications/app_registry.h"
+#include "../../../../applications/app_registry.h"
 #include "../../../../TlmCmd/block_command_definitions.h"
 
 #include <src_core/TlmCmd/block_command_loader.h>
diff --git a/examples/mobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_gs_related_process.c b/examples/mobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_gs_related_process.c
index c2d03513c..e510d28af 100644
--- a/examples/mobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_gs_related_process.c
+++ b/examples/mobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_gs_related_process.c
@@ -2,7 +2,7 @@
 #include "tl_elem_gs_related_process.h"
 
 #include "../../../../TlmCmd/block_command_definitions.h"
-#include "../../../../Applications/app_registry.h"
+#include "../../../../applications/app_registry.h"
 
 #include <src_core/TlmCmd/block_command_loader.h>
 
diff --git a/examples/mobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_tlm_cmd_hirate.c b/examples/mobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_tlm_cmd_hirate.c
index c5c5740ab..ea06053bb 100644
--- a/examples/mobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_tlm_cmd_hirate.c
+++ b/examples/mobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_tlm_cmd_hirate.c
@@ -1,7 +1,7 @@
 #pragma section REPRO
 #include "tl_elem_tlm_cmd_hirate.h"
 
-#include "../../../../Applications/app_registry.h"
+#include "../../../../applications/app_registry.h"
 #include "../../../../TlmCmd/block_command_definitions.h"
 
 #include <src_core/TlmCmd/block_command_loader.h>
diff --git a/examples/mobc/src/src_user/Settings/Modes/TaskLists/tl_initial.c b/examples/mobc/src/src_user/Settings/Modes/TaskLists/tl_initial.c
index 41c63cb4a..93549da30 100644
--- a/examples/mobc/src/src_user/Settings/Modes/TaskLists/tl_initial.c
+++ b/examples/mobc/src/src_user/Settings/Modes/TaskLists/tl_initial.c
@@ -1,7 +1,7 @@
 #pragma section REPRO
 #include "tl_initial.h"
 
-#include "../../../Applications/app_registry.h"
+#include "../../../applications/app_registry.h"
 #include "../../../TlmCmd/block_command_definitions.h"
 
 #include <src_core/TlmCmd/block_command_loader.h>
diff --git a/examples/mobc/src/src_user/Settings/Modes/Transitions/sequence_items.h b/examples/mobc/src/src_user/Settings/Modes/Transitions/sequence_items.h
index 891a88749..fdc675646 100644
--- a/examples/mobc/src/src_user/Settings/Modes/Transitions/sequence_items.h
+++ b/examples/mobc/src/src_user/Settings/Modes/Transitions/sequence_items.h
@@ -2,7 +2,7 @@
 #define SEQUENCE_ITEMS_H_
 
 #include <src_core/TlmCmd/block_command_table.h>
-#include <src_core/Applications/timeline_command_dispatcher_id_define.h>
+#include <src_core/applications/timeline_command_dispatcher_id_define.h>
 
 // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 // SIを使うことはもう非推奨！！！
diff --git a/examples/mobc/src/src_user/Settings/Modes/Transitions/sl_initial.c b/examples/mobc/src/src_user/Settings/Modes/Transitions/sl_initial.c
index 5a91cefca..fc274aeb6 100644
--- a/examples/mobc/src/src_user/Settings/Modes/Transitions/sl_initial.c
+++ b/examples/mobc/src/src_user/Settings/Modes/Transitions/sl_initial.c
@@ -6,7 +6,7 @@
 
 #include "../../../Drivers/Com/gs.h"
 
-#include <src_core/Applications/timeline_command_dispatcher_id_define.h>
+#include <src_core/applications/timeline_command_dispatcher_id_define.h>
 #include <src_core/TlmCmd/block_command_loader.h>
 #include <src_core/System/TimeManager/obc_time.h>
 
diff --git a/examples/mobc/src/src_user/Settings/TlmCmd/packet_handler_params.h b/examples/mobc/src/src_user/Settings/TlmCmd/packet_handler_params.h
index 1f6e03e71..6a6b4f635 100644
--- a/examples/mobc/src/src_user/Settings/TlmCmd/packet_handler_params.h
+++ b/examples/mobc/src/src_user/Settings/TlmCmd/packet_handler_params.h
@@ -6,8 +6,8 @@
 #define PACKET_HANDLER_PARAMS_H_
 
 // TL_MIS, DR の利用の有無で必要な PL が変わるので， include する
-#include "../Applications/timeline_command_dispatcher_define.h"
-#include "../Applications/data_recorder_define.h"
+#include "../applications/timeline_command_dispatcher_define.h"
+#include "../applications/data_recorder_define.h"
 
 
 #undef TL_TLM_PAGE_SIZE
diff --git a/examples/mobc/src/src_user/Settings/Applications/data_recorder_define.h b/examples/mobc/src/src_user/Settings/applications/data_recorder_define.h
similarity index 100%
rename from examples/mobc/src/src_user/Settings/Applications/data_recorder_define.h
rename to examples/mobc/src/src_user/Settings/applications/data_recorder_define.h
diff --git a/examples/mobc/src/src_user/Settings/Applications/divided_cmd_utility_params.h b/examples/mobc/src/src_user/Settings/applications/divided_cmd_utility_params.h
similarity index 100%
rename from examples/mobc/src/src_user/Settings/Applications/divided_cmd_utility_params.h
rename to examples/mobc/src/src_user/Settings/applications/divided_cmd_utility_params.h
diff --git a/examples/mobc/src/src_user/Settings/Applications/telemetry_manager_define.h b/examples/mobc/src/src_user/Settings/applications/telemetry_manager_define.h
similarity index 100%
rename from examples/mobc/src/src_user/Settings/Applications/telemetry_manager_define.h
rename to examples/mobc/src/src_user/Settings/applications/telemetry_manager_define.h
diff --git a/examples/mobc/src/src_user/Settings/Applications/telemetry_manager_params.h b/examples/mobc/src/src_user/Settings/applications/telemetry_manager_params.h
similarity index 100%
rename from examples/mobc/src/src_user/Settings/Applications/telemetry_manager_params.h
rename to examples/mobc/src/src_user/Settings/applications/telemetry_manager_params.h
diff --git a/examples/mobc/src/src_user/Settings/Applications/timeline_command_dispatcher_define.h b/examples/mobc/src/src_user/Settings/applications/timeline_command_dispatcher_define.h
similarity index 100%
rename from examples/mobc/src/src_user/Settings/Applications/timeline_command_dispatcher_define.h
rename to examples/mobc/src/src_user/Settings/applications/timeline_command_dispatcher_define.h
diff --git a/examples/mobc/src/src_user/Test/README.md b/examples/mobc/src/src_user/Test/README.md
index 027681d07..042c71489 100644
--- a/examples/mobc/src/src_user/Test/README.md
+++ b/examples/mobc/src/src_user/Test/README.md
@@ -14,8 +14,8 @@
 ### フォルダ構成
 - C2A と揃える．
 - ファイル名は， `test_${c2a_src_filename}.py`．例えば次のようなもの．
-    - './test/src_core/Applications/test_nop.py'
-    - './test/src_user/Applications/UserDefined/test_tlm_mem_dump.py'
+    - './test/src_core/applications/test_nop.py'
+    - './test/src_user/applications/user_defined/test_tlm_mem_dump.py'
 
 ### 関数名
 `test_hoge` という関数を定義すれば，それが実行される．
@@ -41,10 +41,10 @@ pytest -m sils -v ./test/  # SILSの場合
 
 個別ファイルをテストしたい場合は，以下などでOK．
 ```
-pytest -m real -v ./test/src_user/Applications/UserDefined/test_tlm_mem_dump.py
+pytest -m real -v ./test/src_user/applications/user_defined/test_tlm_mem_dump.py
 
 or
 
-cd ./test/src_user/Applications/UserDefined/
+cd ./test/src_user/applications/user_defined/
 pytest -m real -v test_tlm_mem_dump.py
 ```
diff --git a/examples/mobc/src/src_user/Test/test/src_core/Applications/test_event_utility.py b/examples/mobc/src/src_user/Test/test/src_core/applications/test_event_utility.py
similarity index 100%
rename from examples/mobc/src/src_user/Test/test/src_core/Applications/test_event_utility.py
rename to examples/mobc/src/src_user/Test/test/src_core/applications/test_event_utility.py
diff --git a/examples/mobc/src/src_user/Test/test/src_core/Applications/test_timeline_command_dispatcher.py b/examples/mobc/src/src_user/Test/test/src_core/applications/test_timeline_command_dispatcher.py
similarity index 100%
rename from examples/mobc/src/src_user/Test/test/src_core/Applications/test_timeline_command_dispatcher.py
rename to examples/mobc/src/src_user/Test/test/src_core/applications/test_timeline_command_dispatcher.py
diff --git a/examples/mobc/src/src_user/TlmCmd/NormalBlockCommandDefinition/nbc_start_hk_tlm.c b/examples/mobc/src/src_user/TlmCmd/NormalBlockCommandDefinition/nbc_start_hk_tlm.c
index e8e23aae4..5c6bbc6e0 100644
--- a/examples/mobc/src/src_user/TlmCmd/NormalBlockCommandDefinition/nbc_start_hk_tlm.c
+++ b/examples/mobc/src/src_user/TlmCmd/NormalBlockCommandDefinition/nbc_start_hk_tlm.c
@@ -5,7 +5,7 @@
 #include "../command_definitions.h"
 #include "../telemetry_definitions.h"
 
-#include <src_core/Applications/timeline_command_dispatcher_id_define.h>
+#include <src_core/applications/timeline_command_dispatcher_id_define.h>
 #include <src_core/TlmCmd/block_command_loader.h>
 
 
diff --git a/examples/mobc/src/src_user/TlmCmd/command_source.h b/examples/mobc/src/src_user/TlmCmd/command_source.h
index 3ec420163..328ce1647 100644
--- a/examples/mobc/src/src_user/TlmCmd/command_source.h
+++ b/examples/mobc/src/src_user/TlmCmd/command_source.h
@@ -17,6 +17,6 @@
 #include <src_core/TlmCmd/command_dispatcher_manager.h>
 #include <src_core/TlmCmd/telemetry_generator.h>
 #include <src_core/TlmCmd/telemetry_frame.h>
-#include "../Applications/app_headers.h"
+#include "../applications/app_headers.h"
 
 #endif
diff --git a/examples/mobc/src/src_user/TlmCmd/telemetry_source.h b/examples/mobc/src/src_user/TlmCmd/telemetry_source.h
index c37e1567e..da45e090b 100644
--- a/examples/mobc/src/src_user/TlmCmd/telemetry_source.h
+++ b/examples/mobc/src/src_user/TlmCmd/telemetry_source.h
@@ -16,7 +16,7 @@
 #include <src_core/TlmCmd/command_analyze.h>
 #include <src_core/TlmCmd/command_dispatcher_manager.h>
 #include <src_core/TlmCmd/block_command_executor.h>
-#include "../Applications/app_headers.h"
+#include "../applications/app_headers.h"
 #include "../Drivers/Aocs/aobc_telemetry_buffer.h"
 #include "../Drivers/Com/gs_validate.h"
 #include "../Settings/build_settings.h"
diff --git a/examples/mobc/src/src_user/TlmCmd/user_packet_handler.c b/examples/mobc/src/src_user/TlmCmd/user_packet_handler.c
index 0d22ef806..4e02fd2fc 100644
--- a/examples/mobc/src/src_user/TlmCmd/user_packet_handler.c
+++ b/examples/mobc/src/src_user/TlmCmd/user_packet_handler.c
@@ -5,8 +5,8 @@
  */
 #include "user_packet_handler.h"
 #include <src_core/TlmCmd/packet_list_util.h>
-#include "../Applications/DriverInstances/di_aobc.h"
-// #include "../Applications/DriverInstances/di_tobc.h"
+#include "../applications/driver_instances/di_aobc.h"
+// #include "../applications/driver_instances/di_tobc.h"
 
 #define PH_AOBC_CMD_LIST_MAX   (16)          //!< AOBC CMD QUEUEサイズ
 #define PH_TOBC_CMD_LIST_MAX   (16)          //!< TOBC CMD QUEUEサイズ
diff --git a/examples/mobc/src/src_user/Applications/CMakeLists.txt b/examples/mobc/src/src_user/applications/CMakeLists.txt
similarity index 70%
rename from examples/mobc/src/src_user/Applications/CMakeLists.txt
rename to examples/mobc/src/src_user/applications/CMakeLists.txt
index 8d7b242b3..1bef2501e 100644
--- a/examples/mobc/src/src_user/Applications/CMakeLists.txt
+++ b/examples/mobc/src/src_user/applications/CMakeLists.txt
@@ -4,10 +4,10 @@ project(C2A_USER_APPS)
 
 set(C2A_SRCS
   app_registry.c
-  DriverInstances/di_aobc.c
-  DriverInstances/di_gs.c
-  DriverInstances/di_uart_test.c
-  UserDefined/debug_apps.c
+  driver_instances/di_aobc.c
+  driver_instances/di_gs.c
+  driver_instances/di_uart_test.c
+  user_defined/debug_apps.c
 )
 
 if(BUILD_C2A_AS_CXX)
diff --git a/examples/mobc/src/src_user/applications/app_headers.h b/examples/mobc/src/src_user/applications/app_headers.h
new file mode 100644
index 000000000..77be8a6bb
--- /dev/null
+++ b/examples/mobc/src/src_user/applications/app_headers.h
@@ -0,0 +1,31 @@
+/**
+ * @file
+ * @brief Appのヘッダをまとめたヘッダ
+ */
+#ifndef APP_HEADERS_H_
+#define APP_HEADERS_H_
+
+// Core
+#include <src_core/applications/nop.h>
+#include <src_core/applications/gs_command_dispatcher.h>
+#include <src_core/applications/realtime_command_dispatcher.h>
+#include <src_core/applications/timeline_command_dispatcher.h>
+#include <src_core/applications/event_utility.h>
+#include <src_core/applications/memory_dump.h>
+#include <src_core/applications/telemetry_manager.h>
+#include <src_core/applications/utility_command.h>
+#include <src_core/applications/utility_counter.h>
+#include <src_core/applications/divided_cmd_utility.h>
+
+// Core TestApp
+#include <src_core/applications/test_app/test_ccp_util.h>
+
+// DI
+#include "driver_instances/di_aobc.h"
+#include "driver_instances/di_uart_test.h"
+#include "driver_instances/di_gs.h"
+
+// UserDefined
+#include "user_defined/debug_apps.h"
+
+#endif
diff --git a/examples/mobc/src/src_user/Applications/app_registry.c b/examples/mobc/src/src_user/applications/app_registry.c
similarity index 100%
rename from examples/mobc/src/src_user/Applications/app_registry.c
rename to examples/mobc/src/src_user/applications/app_registry.c
diff --git a/examples/mobc/src/src_user/Applications/app_registry.h b/examples/mobc/src/src_user/applications/app_registry.h
similarity index 92%
rename from examples/mobc/src/src_user/Applications/app_registry.h
rename to examples/mobc/src/src_user/applications/app_registry.h
index e54aebcf7..6580b95bb 100644
--- a/examples/mobc/src/src_user/Applications/app_registry.h
+++ b/examples/mobc/src/src_user/applications/app_registry.h
@@ -1,6 +1,6 @@
 #ifndef APP_REGISTRY_H_
 #define APP_REGISTRY_H_
-#include <src_user/Settings/Applications/timeline_command_dispatcher_define.h>
+#include <src_user/Settings/applications/timeline_command_dispatcher_define.h>
 
 // こいつの自動生成がほしい．．．
 typedef enum
diff --git a/examples/mobc/src/src_user/Applications/DriverInstances/di_aobc.c b/examples/mobc/src/src_user/applications/driver_instances/di_aobc.c
similarity index 100%
rename from examples/mobc/src/src_user/Applications/DriverInstances/di_aobc.c
rename to examples/mobc/src/src_user/applications/driver_instances/di_aobc.c
diff --git a/examples/mobc/src/src_user/Applications/DriverInstances/di_aobc.h b/examples/mobc/src/src_user/applications/driver_instances/di_aobc.h
similarity index 100%
rename from examples/mobc/src/src_user/Applications/DriverInstances/di_aobc.h
rename to examples/mobc/src/src_user/applications/driver_instances/di_aobc.h
diff --git a/examples/mobc/src/src_user/Applications/DriverInstances/di_gs.c b/examples/mobc/src/src_user/applications/driver_instances/di_gs.c
similarity index 100%
rename from examples/mobc/src/src_user/Applications/DriverInstances/di_gs.c
rename to examples/mobc/src/src_user/applications/driver_instances/di_gs.c
diff --git a/examples/mobc/src/src_user/Applications/DriverInstances/di_gs.h b/examples/mobc/src/src_user/applications/driver_instances/di_gs.h
similarity index 100%
rename from examples/mobc/src/src_user/Applications/DriverInstances/di_gs.h
rename to examples/mobc/src/src_user/applications/driver_instances/di_gs.h
diff --git a/examples/mobc/src/src_user/Applications/DriverInstances/di_uart_test.c b/examples/mobc/src/src_user/applications/driver_instances/di_uart_test.c
similarity index 100%
rename from examples/mobc/src/src_user/Applications/DriverInstances/di_uart_test.c
rename to examples/mobc/src/src_user/applications/driver_instances/di_uart_test.c
diff --git a/examples/mobc/src/src_user/Applications/DriverInstances/di_uart_test.h b/examples/mobc/src/src_user/applications/driver_instances/di_uart_test.h
similarity index 100%
rename from examples/mobc/src/src_user/Applications/DriverInstances/di_uart_test.h
rename to examples/mobc/src/src_user/applications/driver_instances/di_uart_test.h
diff --git a/examples/mobc/src/src_user/Applications/Middleware/.gitkeep b/examples/mobc/src/src_user/applications/middleware/.gitkeep
similarity index 100%
rename from examples/mobc/src/src_user/Applications/Middleware/.gitkeep
rename to examples/mobc/src/src_user/applications/middleware/.gitkeep
diff --git a/examples/mobc/src/src_user/Applications/UserDefined/Aocs/.gitkeep b/examples/mobc/src/src_user/applications/user_defined/Aocs/.gitkeep
similarity index 100%
rename from examples/mobc/src/src_user/Applications/UserDefined/Aocs/.gitkeep
rename to examples/mobc/src/src_user/applications/user_defined/Aocs/.gitkeep
diff --git a/examples/mobc/src/src_user/Applications/UserDefined/Cdh/.gitkeep b/examples/mobc/src/src_user/applications/user_defined/Cdh/.gitkeep
similarity index 100%
rename from examples/mobc/src/src_user/Applications/UserDefined/Cdh/.gitkeep
rename to examples/mobc/src/src_user/applications/user_defined/Cdh/.gitkeep
diff --git a/examples/mobc/src/src_user/Applications/UserDefined/Com/.gitkeep b/examples/mobc/src/src_user/applications/user_defined/Com/.gitkeep
similarity index 100%
rename from examples/mobc/src/src_user/Applications/UserDefined/Com/.gitkeep
rename to examples/mobc/src/src_user/applications/user_defined/Com/.gitkeep
diff --git a/examples/mobc/src/src_user/Applications/UserDefined/Mission/.gitkeep b/examples/mobc/src/src_user/applications/user_defined/Mission/.gitkeep
similarity index 100%
rename from examples/mobc/src/src_user/Applications/UserDefined/Mission/.gitkeep
rename to examples/mobc/src/src_user/applications/user_defined/Mission/.gitkeep
diff --git a/examples/mobc/src/src_user/Applications/UserDefined/Power/.gitkeep b/examples/mobc/src/src_user/applications/user_defined/Power/.gitkeep
similarity index 100%
rename from examples/mobc/src/src_user/Applications/UserDefined/Power/.gitkeep
rename to examples/mobc/src/src_user/applications/user_defined/Power/.gitkeep
diff --git a/examples/mobc/src/src_user/Applications/UserDefined/Prop/.gitkeep b/examples/mobc/src/src_user/applications/user_defined/Prop/.gitkeep
similarity index 100%
rename from examples/mobc/src/src_user/Applications/UserDefined/Prop/.gitkeep
rename to examples/mobc/src/src_user/applications/user_defined/Prop/.gitkeep
diff --git a/examples/mobc/src/src_user/Applications/UserDefined/Thermal/.gitkeep b/examples/mobc/src/src_user/applications/user_defined/Thermal/.gitkeep
similarity index 100%
rename from examples/mobc/src/src_user/Applications/UserDefined/Thermal/.gitkeep
rename to examples/mobc/src/src_user/applications/user_defined/Thermal/.gitkeep
diff --git a/examples/mobc/src/src_user/Applications/UserDefined/debug_apps.c b/examples/mobc/src/src_user/applications/user_defined/debug_apps.c
similarity index 95%
rename from examples/mobc/src/src_user/Applications/UserDefined/debug_apps.c
rename to examples/mobc/src/src_user/applications/user_defined/debug_apps.c
index 194c828c6..8b86e7eea 100644
--- a/examples/mobc/src/src_user/Applications/UserDefined/debug_apps.c
+++ b/examples/mobc/src/src_user/applications/user_defined/debug_apps.c
@@ -14,11 +14,11 @@
 #include <src_core/TlmCmd/packet_handler.h>
 #include "../../TlmCmd/telemetry_definitions.h"
 #include <src_core/TlmCmd/block_command_table.h>
-#include <src_core/Applications/memory_dump.h>
-#include <src_core/Applications/gs_command_dispatcher.h>
-#include <src_core/Applications/realtime_command_dispatcher.h>
-#include <src_core/Applications/timeline_command_dispatcher.h>
-#include "../../Applications/DriverInstances/di_gs.h"
+#include <src_core/applications/memory_dump.h>
+#include <src_core/applications/gs_command_dispatcher.h>
+#include <src_core/applications/realtime_command_dispatcher.h>
+#include <src_core/applications/timeline_command_dispatcher.h>
+#include "../../applications/driver_instances/di_gs.h"
 // #include <src_core/TlmCmd/telemetry_generator.h>
 #include "../../Library/vt100.h"
 #include <src_core/Library/result.h>
diff --git a/examples/mobc/src/src_user/Applications/UserDefined/debug_apps.h b/examples/mobc/src/src_user/applications/user_defined/debug_apps.h
similarity index 100%
rename from examples/mobc/src/src_user/Applications/UserDefined/debug_apps.h
rename to examples/mobc/src/src_user/applications/user_defined/debug_apps.h
diff --git a/examples/mobc/src/src_user/script/add_section/settings.pl b/examples/mobc/src/src_user/script/add_section/settings.pl
index 433f33619..93a007277 100644
--- a/examples/mobc/src/src_user/script/add_section/settings.pl
+++ b/examples/mobc/src/src_user/script/add_section/settings.pl
@@ -16,7 +16,7 @@ sub GetSetting {
 	$SETTING{'FILE_ENCODING'} = 'utf8';
 	$SETTING{'LOG_FILE'}  = './log.log';
 	$SETTING{'SEARCH_PATH'} = [
-		'Applications',
+		'applications',
 		'Drivers',
 		'hal',
 		'Library',
diff --git a/examples/subobc/CMakeLists.txt b/examples/subobc/CMakeLists.txt
index 150e09e74..dd830bb50 100644
--- a/examples/subobc/CMakeLists.txt
+++ b/examples/subobc/CMakeLists.txt
@@ -15,7 +15,7 @@ option(USE_SILS_MOCKUP "Use SILS mockup for build C2A with minimal user in C89 o
 option(BUILD_C2A_AS_SILS_FW "Build C2A as SILS firmware" ON)
 
 set(USE_ALL_C2A_CORE_APPS OFF)
-# Core App のターゲット追加は src_user/Applications/CMakeLists.txt で行う
+# Core App のターゲット追加は src_user/applications/CMakeLists.txt で行う
 set(USE_ALL_C2A_CORE_TEST_APPS OFF)
 
 if(USE_SILS_MOCKUP)
@@ -56,7 +56,7 @@ add_definitions("-DGIT_REVISION_C2A_USER_SHORT=0x${GIT_REVISION_C2A_USER_SHORT}"
 
 add_subdirectory(${C2A_CORE_DIR})
 
-add_subdirectory(${C2A_USER_DIR}/Applications)
+add_subdirectory(${C2A_USER_DIR}/applications)
 add_subdirectory(${C2A_USER_DIR}/Drivers)
 add_subdirectory(${C2A_USER_DIR}/hal)
 add_subdirectory(${C2A_USER_DIR}/Library)
diff --git a/examples/subobc/src/src_user/Applications/CMakeLists.txt b/examples/subobc/src/src_user/Applications/CMakeLists.txt
deleted file mode 100644
index 2acceeefc..000000000
--- a/examples/subobc/src/src_user/Applications/CMakeLists.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-cmake_minimum_required(VERSION 3.13)
-
-project(C2A_USER_APPS)
-
-set(C2A_SRCS
-  app_registry.c
-  DriverInstances/di_mobc.c
-  UserDefined/debug_apps.c
-  ${C2A_CORE_DIR}/Applications/gs_command_dispatcher.c
-  ${C2A_CORE_DIR}/Applications/event_utility.c
-  ${C2A_CORE_DIR}/Applications/nop.c
-  ${C2A_CORE_DIR}/Applications/realtime_command_dispatcher.c
-  ${C2A_CORE_DIR}/Applications/timeline_command_dispatcher.c
-)
-
-if(BUILD_C2A_AS_CXX)
-  set_source_files_properties(${C2A_SRCS} PROPERTIES LANGUAGE CXX)  # C++
-endif()
-
-add_library(${PROJECT_NAME} OBJECT ${C2A_SRCS})
-
-include(${C2A_USER_DIR}/common.cmake)
diff --git a/examples/subobc/src/src_user/Applications/app_headers.h b/examples/subobc/src/src_user/Applications/app_headers.h
deleted file mode 100644
index 6d88caa99..000000000
--- a/examples/subobc/src/src_user/Applications/app_headers.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/**
- * @file
- * @brief Appのヘッダをまとめたヘッダ
- */
-#ifndef APP_HEADERS_H_
-#define APP_HEADERS_H_
-
-// Core
-#include <src_core/Applications/nop.h>
-#include <src_core/Applications/gs_command_dispatcher.h>
-#include <src_core/Applications/realtime_command_dispatcher.h>
-#include <src_core/Applications/timeline_command_dispatcher.h>
-#include <src_core/Applications/event_utility.h>
-
-// Core TestApp
-#include <src_core/Applications/TestApp/test_ccp_util.h>
-
-// DI
-#include "DriverInstances/di_mobc.h"
-
-// UserDefined
-#include "UserDefined/debug_apps.h"
-
-#endif
diff --git a/examples/subobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_debug_display.c b/examples/subobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_debug_display.c
index 91850d88b..08e5169f6 100644
--- a/examples/subobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_debug_display.c
+++ b/examples/subobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_debug_display.c
@@ -1,7 +1,7 @@
 #pragma section REPRO
 #include "tl_elem_debug_display.h"
 
-#include "../../../../Applications/app_registry.h"
+#include "../../../../applications/app_registry.h"
 #include "../../../../TlmCmd/block_command_definitions.h"
 
 #include <src_core/TlmCmd/block_command_loader.h>
diff --git a/examples/subobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_gs_related_process.c b/examples/subobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_gs_related_process.c
index dadb3ef1a..04f63839c 100644
--- a/examples/subobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_gs_related_process.c
+++ b/examples/subobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_gs_related_process.c
@@ -2,7 +2,7 @@
 #include "tl_elem_gs_related_process.h"
 
 #include "../../../../TlmCmd/block_command_definitions.h"
-#include "../../../../Applications/app_registry.h"
+#include "../../../../applications/app_registry.h"
 
 #include <src_core/TlmCmd/block_command_loader.h>
 
diff --git a/examples/subobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_tlm_cmd_hirate.c b/examples/subobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_tlm_cmd_hirate.c
index 62b215ba2..a8ad590dc 100644
--- a/examples/subobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_tlm_cmd_hirate.c
+++ b/examples/subobc/src/src_user/Settings/Modes/TaskLists/Elements/tl_elem_tlm_cmd_hirate.c
@@ -1,7 +1,7 @@
 #pragma section REPRO
 #include "tl_elem_tlm_cmd_hirate.h"
 
-#include "../../../../Applications/app_registry.h"
+#include "../../../../applications/app_registry.h"
 #include "../../../../TlmCmd/block_command_definitions.h"
 
 #include <src_core/TlmCmd/block_command_loader.h>
diff --git a/examples/subobc/src/src_user/Settings/Modes/TaskLists/tl_initial.c b/examples/subobc/src/src_user/Settings/Modes/TaskLists/tl_initial.c
index ba7038fef..a0900bec7 100644
--- a/examples/subobc/src/src_user/Settings/Modes/TaskLists/tl_initial.c
+++ b/examples/subobc/src/src_user/Settings/Modes/TaskLists/tl_initial.c
@@ -1,7 +1,7 @@
 #pragma section REPRO
 #include "tl_initial.h"
 
-#include "../../../Applications/app_registry.h"
+#include "../../../applications/app_registry.h"
 #include "../../../TlmCmd/block_command_definitions.h"
 
 #include <src_core/TlmCmd/block_command_loader.h>
diff --git a/examples/subobc/src/src_user/Settings/Modes/Transitions/sl_initial.c b/examples/subobc/src/src_user/Settings/Modes/Transitions/sl_initial.c
index 180fcf23d..f66fea013 100644
--- a/examples/subobc/src/src_user/Settings/Modes/Transitions/sl_initial.c
+++ b/examples/subobc/src/src_user/Settings/Modes/Transitions/sl_initial.c
@@ -4,7 +4,7 @@
 #include "../../../TlmCmd/block_command_definitions.h"
 #include "../../../TlmCmd/command_definitions.h"
 
-#include <src_core/Applications/timeline_command_dispatcher_id_define.h>
+#include <src_core/applications/timeline_command_dispatcher_id_define.h>
 #include <src_core/TlmCmd/block_command_loader.h>
 #include <src_core/System/TimeManager/obc_time.h>
 
diff --git a/examples/subobc/src/src_user/Settings/Applications/data_recorder_define.h b/examples/subobc/src/src_user/Settings/applications/data_recorder_define.h
similarity index 100%
rename from examples/subobc/src/src_user/Settings/Applications/data_recorder_define.h
rename to examples/subobc/src/src_user/Settings/applications/data_recorder_define.h
diff --git a/examples/subobc/src/src_user/Settings/Applications/timeline_command_dispatcher_define.h b/examples/subobc/src/src_user/Settings/applications/timeline_command_dispatcher_define.h
similarity index 100%
rename from examples/subobc/src/src_user/Settings/Applications/timeline_command_dispatcher_define.h
rename to examples/subobc/src/src_user/Settings/applications/timeline_command_dispatcher_define.h
diff --git a/examples/subobc/src/src_user/TlmCmd/NormalBlockCommandDefinition/nbc_start_hk_tlm.c b/examples/subobc/src/src_user/TlmCmd/NormalBlockCommandDefinition/nbc_start_hk_tlm.c
index 7aea406d1..bae1cda67 100644
--- a/examples/subobc/src/src_user/TlmCmd/NormalBlockCommandDefinition/nbc_start_hk_tlm.c
+++ b/examples/subobc/src/src_user/TlmCmd/NormalBlockCommandDefinition/nbc_start_hk_tlm.c
@@ -5,7 +5,7 @@
 #include "../command_definitions.h"
 #include "../telemetry_definitions.h"
 
-#include <src_core/Applications/timeline_command_dispatcher_id_define.h>
+#include <src_core/applications/timeline_command_dispatcher_id_define.h>
 #include <src_core/TlmCmd/block_command_loader.h>
 
 
diff --git a/examples/subobc/src/src_user/TlmCmd/command_source.h b/examples/subobc/src/src_user/TlmCmd/command_source.h
index 3ec420163..328ce1647 100644
--- a/examples/subobc/src/src_user/TlmCmd/command_source.h
+++ b/examples/subobc/src/src_user/TlmCmd/command_source.h
@@ -17,6 +17,6 @@
 #include <src_core/TlmCmd/command_dispatcher_manager.h>
 #include <src_core/TlmCmd/telemetry_generator.h>
 #include <src_core/TlmCmd/telemetry_frame.h>
-#include "../Applications/app_headers.h"
+#include "../applications/app_headers.h"
 
 #endif
diff --git a/examples/subobc/src/src_user/TlmCmd/telemetry_source.h b/examples/subobc/src/src_user/TlmCmd/telemetry_source.h
index 9db9e05ef..eff4b1160 100644
--- a/examples/subobc/src/src_user/TlmCmd/telemetry_source.h
+++ b/examples/subobc/src/src_user/TlmCmd/telemetry_source.h
@@ -17,7 +17,7 @@
 #include <src_core/TlmCmd/command_analyze.h>
 #include <src_core/TlmCmd/command_dispatcher_manager.h>
 #include <src_core/TlmCmd/block_command_executor.h>
-#include "../Applications/app_headers.h"
+#include "../applications/app_headers.h"
 #include "../Settings/build_settings.h"
 
 #endif
diff --git a/examples/subobc/src/src_user/applications/CMakeLists.txt b/examples/subobc/src/src_user/applications/CMakeLists.txt
new file mode 100644
index 000000000..892932512
--- /dev/null
+++ b/examples/subobc/src/src_user/applications/CMakeLists.txt
@@ -0,0 +1,22 @@
+cmake_minimum_required(VERSION 3.13)
+
+project(C2A_USER_APPS)
+
+set(C2A_SRCS
+  app_registry.c
+  driver_instances/di_mobc.c
+  user_defined/debug_apps.c
+  ${C2A_CORE_DIR}/applications/gs_command_dispatcher.c
+  ${C2A_CORE_DIR}/applications/event_utility.c
+  ${C2A_CORE_DIR}/applications/nop.c
+  ${C2A_CORE_DIR}/applications/realtime_command_dispatcher.c
+  ${C2A_CORE_DIR}/applications/timeline_command_dispatcher.c
+)
+
+if(BUILD_C2A_AS_CXX)
+  set_source_files_properties(${C2A_SRCS} PROPERTIES LANGUAGE CXX)  # C++
+endif()
+
+add_library(${PROJECT_NAME} OBJECT ${C2A_SRCS})
+
+include(${C2A_USER_DIR}/common.cmake)
diff --git a/examples/subobc/src/src_user/applications/app_headers.h b/examples/subobc/src/src_user/applications/app_headers.h
new file mode 100644
index 000000000..d87156c6a
--- /dev/null
+++ b/examples/subobc/src/src_user/applications/app_headers.h
@@ -0,0 +1,24 @@
+/**
+ * @file
+ * @brief Appのヘッダをまとめたヘッダ
+ */
+#ifndef APP_HEADERS_H_
+#define APP_HEADERS_H_
+
+// Core
+#include <src_core/applications/nop.h>
+#include <src_core/applications/gs_command_dispatcher.h>
+#include <src_core/applications/realtime_command_dispatcher.h>
+#include <src_core/applications/timeline_command_dispatcher.h>
+#include <src_core/applications/event_utility.h>
+
+// Core TestApp
+#include <src_core/applications/test_app/test_ccp_util.h>
+
+// DI
+#include "driver_instances/di_mobc.h"
+
+// UserDefined
+#include "user_defined/debug_apps.h"
+
+#endif
diff --git a/examples/subobc/src/src_user/Applications/app_registry.c b/examples/subobc/src/src_user/applications/app_registry.c
similarity index 100%
rename from examples/subobc/src/src_user/Applications/app_registry.c
rename to examples/subobc/src/src_user/applications/app_registry.c
diff --git a/examples/subobc/src/src_user/Applications/app_registry.h b/examples/subobc/src/src_user/applications/app_registry.h
similarity index 91%
rename from examples/subobc/src/src_user/Applications/app_registry.h
rename to examples/subobc/src/src_user/applications/app_registry.h
index c9975612e..fb8c50914 100644
--- a/examples/subobc/src/src_user/Applications/app_registry.h
+++ b/examples/subobc/src/src_user/applications/app_registry.h
@@ -1,6 +1,6 @@
 #ifndef APP_REGISTRY_H_
 #define APP_REGISTRY_H_
-#include <src_user/Settings/Applications/timeline_command_dispatcher_define.h>
+#include <src_user/Settings/applications/timeline_command_dispatcher_define.h>
 
 // こいつの自動生成がほしい．．．
 typedef enum
diff --git a/examples/subobc/src/src_user/Applications/DriverInstances/di_mobc.c b/examples/subobc/src/src_user/applications/driver_instances/di_mobc.c
similarity index 100%
rename from examples/subobc/src/src_user/Applications/DriverInstances/di_mobc.c
rename to examples/subobc/src/src_user/applications/driver_instances/di_mobc.c
diff --git a/examples/subobc/src/src_user/Applications/DriverInstances/di_mobc.h b/examples/subobc/src/src_user/applications/driver_instances/di_mobc.h
similarity index 100%
rename from examples/subobc/src/src_user/Applications/DriverInstances/di_mobc.h
rename to examples/subobc/src/src_user/applications/driver_instances/di_mobc.h
diff --git a/examples/subobc/src/src_user/Applications/Middleware/.gitkeep b/examples/subobc/src/src_user/applications/middleware/.gitkeep
similarity index 100%
rename from examples/subobc/src/src_user/Applications/Middleware/.gitkeep
rename to examples/subobc/src/src_user/applications/middleware/.gitkeep
diff --git a/examples/subobc/src/src_user/Applications/UserDefined/debug_apps.c b/examples/subobc/src/src_user/applications/user_defined/debug_apps.c
similarity index 95%
rename from examples/subobc/src/src_user/Applications/UserDefined/debug_apps.c
rename to examples/subobc/src/src_user/applications/user_defined/debug_apps.c
index 0aff9a00c..eabfe7e51 100644
--- a/examples/subobc/src/src_user/Applications/UserDefined/debug_apps.c
+++ b/examples/subobc/src/src_user/applications/user_defined/debug_apps.c
@@ -14,11 +14,11 @@
 #include <src_core/TlmCmd/packet_handler.h>
 #include "../../TlmCmd/telemetry_definitions.h"
 #include <src_core/TlmCmd/block_command_table.h>
-#include <src_core/Applications/memory_dump.h>
-#include <src_core/Applications/gs_command_dispatcher.h>
-#include <src_core/Applications/realtime_command_dispatcher.h>
-#include <src_core/Applications/timeline_command_dispatcher.h>
-#include "../../Applications/DriverInstances/di_mobc.h"
+#include <src_core/applications/memory_dump.h>
+#include <src_core/applications/gs_command_dispatcher.h>
+#include <src_core/applications/realtime_command_dispatcher.h>
+#include <src_core/applications/timeline_command_dispatcher.h>
+#include "../../applications/driver_instances/di_mobc.h"
 // #include <src_core/TlmCmd/telemetry_generator.h>
 #include "../../Library/vt100.h"
 #include <src_core/Library/result.h>
diff --git a/examples/subobc/src/src_user/Applications/UserDefined/debug_apps.h b/examples/subobc/src/src_user/applications/user_defined/debug_apps.h
similarity index 100%
rename from examples/subobc/src/src_user/Applications/UserDefined/debug_apps.h
rename to examples/subobc/src/src_user/applications/user_defined/debug_apps.h
diff --git a/examples/subobc/src/src_user/script/add_section/settings.pl b/examples/subobc/src/src_user/script/add_section/settings.pl
index 433f33619..93a007277 100644
--- a/examples/subobc/src/src_user/script/add_section/settings.pl
+++ b/examples/subobc/src/src_user/script/add_section/settings.pl
@@ -16,7 +16,7 @@ sub GetSetting {
 	$SETTING{'FILE_ENCODING'} = 'utf8';
 	$SETTING{'LOG_FILE'}  = './log.log';
 	$SETTING{'SEARCH_PATH'} = [
-		'Applications',
+		'applications',
 		'Drivers',
 		'hal',
 		'Library',
diff --git a/examples/subobc/sync_with_mobc_example.bat b/examples/subobc/sync_with_mobc_example.bat
index 9920a6724..665cb4e61 100644
--- a/examples/subobc/sync_with_mobc_example.bat
+++ b/examples/subobc/sync_with_mobc_example.bat
@@ -13,7 +13,7 @@ call :sync_dir ".\src\src_user\ReProgramming\" "..\mobc\src\src_user\ReProgrammi
 call :sync_dir ".\src\src_user\script\" "..\mobc\src\src_user\script\"
 call :sync_dir ".\src\src_user\Settings\TlmCmd\Ccsds\" "..\mobc\src\src_user\Settings\TlmCmd\Ccsds\"
 
-call :sync_file ".\src\src_user\Applications\UserDefined\debug_apps.h" "..\mobc\src\src_user\Applications\UserDefined\debug_apps.h"
+call :sync_file ".\src\src_user\applications\user_defined\debug_apps.h" "..\mobc\src\src_user\applications\user_defined\debug_apps.h"
 call :sync_file ".\src\src_user\hal\sils\uart_sils_sci_if.hpp" "..\mobc\src\src_user\hal\sils\uart_sils_sci_if.hpp"
 call :sync_file ".\src\src_user\hal\sils\wdt_sils.cpp" "..\mobc\src\src_user\hal\sils\wdt_sils.cpp"
 call :sync_file ".\src\src_user\hal\sils_mockup\README.md" "..\mobc\src\src_user\hal\sils_mockup\README.md"