IBM Personal Computer 78 Programming 61 BASIC (Computer program language) 17 Computer programs 7 IBM Personal Computer XT 7 Business 6 Computer graphics 6 Data processing 6 Pascal (Computer program language) 6 Assembler language (Computer program language) 5 Microcomputers 4 Intel 8088 (Microprocessor) 3 C (Computer program language) 2 Computer software 2 Expansion boards (Microcomputers) 2 IBM Personal System/2 (Computer system) 2 Subroutines (Computer programs) 2 Utilities (Computer programs) 2 Accounting 1 Assembly languages (Electronic computers) 1 Business BASIC (Computer program language) 1 Catalogs 1 Computer interfaces 1 Computer networks 1 Computers 1 DOS (Computer operating system) 1 Database management 1 Electronic spreadsheets 1 Engineering 1 Equipment and supplies 1