Systems: These are courses that teach the basic introduction to PC's and the software required to make the computer run (Operating Systems).
Word Processing: These are courses for teaching you how to use the software that enables you to write memos, letters, books or other publishing.
Spreadsheet: These courses teach how to use software that enables you to computerize your ledgers, calculate financial or other numbers based what if scenarios.
Graphics: These courses teach you how to use special software that can create pictures, images, business charts or even modern art.
Database: These courses teach you how to use the kind of software designed to help you track records of data and calculate and generate various reports from that data.
Internet: If you want to learn how to 'surf the net' or send 'email', these are the classes for you.
Other: This is collection of specialized, limited need courses, cover less commonly used software such as tools for 'Contact Management' or 'Groupware