Flat files store data in plain text format, map to single table
Spreadsheets can organize data in tabular format and can reference multiple tables
XML files used marked up tags to identify data to support hierarchial data structures
Web scraping extract relevant data from unstructured sources based on specified parameters
Data streams are aggregating streams of data flowing from IoT, GPS and social media, with timestamps and geotag metadata
RSS (Really Simple Syndication) captured updated data from sites