IBM Personal Computer 61 Programming 61 BASIC (Computer program language) 17 Computer graphics 6 Pascal (Computer program language) 6 Assembler language (Computer program language) 5 Computer programs 5 IBM Personal Computer XT 4 Business 3 Data processing 3 Intel 8088 (Microprocessor) 3 C (Computer program language) 2 IBM Personal System/2 (Computer system) 2 Subroutines (Computer programs) 2 Utilities (Computer programs) 2 Accounting 1 Assembly languages (Electronic computers) 1 Catalogs 1 Computer software 1 Database management 1 Electronic spreadsheets 1 Engineering 1 Expansion boards (Computers) 1 Expansion boards (Microcomputers) 1 FORTRAN (Computer program language) 1 FORTRAN 77 (Computer program language) 1 File organization (Computer science) 1 Free computer software 1 HALO (Computer program) 1 IBM PCjr (Computer) 1