diff --git a/README.md b/README.md
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 # Monosim
-Monosim is a cross platform application to manage sim card contacts
-using PC/SC standard readers and SmartMouse/Phoenix serial reader.
+**monosim** is a simple application cross platform, written in C# that can be used 
+to read, write, update, delete and backup your sim card contacts. It open and 
+save also .monosim files to manage contacts also in a text files. To connect monosim 
+to your sim card you need use a standard [PC/SC](http://www.pcscworkgroup.com/) smartcard reader 
+as acs, scm, athena, towitoko, etc. or Smartmouse/Phoenix serial reader.
 
 monosim is distributed under the terms of the GNU General Public License (GPLv2)
 
 * **monosim-gtk** - GTK user interface
 * **monosim-qt**  - Qt user interface
 
+
+Cross platform is possible by:
+  * [Mono framework](http://www.mono-project.com/Main_Page)/.Net framework _Runtime_
+  * [Pcsc-lite framework](http://pcsclite.alioth.debian.org/)/Winscard _Middleware for PC/SC smartcard readers communication_
+  * [Gtk-sharp](http://www.mono-project.com/GtkSharp) _C# bindings for GTK libraries_
+  * [Qyoto](http://techbase.kde.org/Development/Languages/Qyoto) _C# bindings for QT libraries_
+
+<br />
+
+
 for build and run see [Wiki pages](https://github.com/armando-basile/monosim/wiki)
 
+---
+
+
+## VIDEO ##
+<p align='center'><a href='http://www.youtube.com/watch?feature=player_embedded&v=v-LfV780lxk' target='_blank'>
+<img src='http://img.youtube.com/vi/v-LfV780lxk/0.jpg' width='480' height=344 /></a></p><br />
+
+
+
 
 Copyright (c) 2008-2015, Armando Basile