Electronic spreadsheets Computer programs 50 Business 47 Word processing 9 Data processing 7 Business presentations 5 Database management 5 Graphic methods 5 Accounting 2 Personal information management 2 Time management 2 Windows (Computer programs) 2 Business communication 1 Commercial correspondence 1 Computer industry 1 Computer input-output equipment 1 Databases 1 Electronic mail systems 1 Handbooks, manuals, etc 1 Human-computer interaction 1 IBM Personal Computer 1 Industrial safety 1 Information technology 1 Lotus 1-2-3 (Computer file) 1 Lotus 1-2-3 (Computer program) 1 Marketing 1 Mathematics 1 Microcomputers 1 Operating systems (Computers) 1 Physics 1