Windows (Computer programs) 20 Operating systems (Computers) 6 Computer programs 4 Microsoft Windows (Computer file) 4 Business -- 3 Computer graphics 2 Electronic spreadsheets 2 Microsoft Excel for Windows 2 Business presentations -- 1 Computer applications 1 Computer graphics -- 1 Computer program 1 Computer security 1 Data processing 1 Electronic spreadsheet 1 Excel 4 for windows (computer program) 1 Graphic methods -- 1 Handbooks, manuals, etc 1 Mathematical statistic -- 1 Microsoft Excel (Computer file) 1 Microsoft PowerPoint 1 Microsoft Powerpoint 2000 1 Microsoft Windows (Computer programs) 1 Windows (Computer programs) -- 1 Windows (computer programs) 1 Windows -- 1 Word for Windows (Computer program) 1 Word processing -- 1 power point 97 1