Structured programming BASIC (Computer program language) 7 COBOL (Computer program language) 7 Computer programming 6 FORTRAN (Computer program language) 5 PL/I (Computer program language) 4 PL/C (Computer program language) 3 Programming 3 Computer software 2 Development 2 Problem solving 2 BASIC-PLUS (Computer program language) 1 C (Computer program language) 1 Data processing 1 FORTRAN 77 (Computer program language) 1 IBM Personal Computer 1 Logic, Symbolic and mathematical 1 Macintosh (Computer) 1 Management 1 Microcomputers 1 PL/CT (Computer program language) 1 Parallel processing (Electronic computers) 1 Parallel programming (Computer science) 1 Pascal (Computer program language) 1 SP/k (Computer program language) 1 System design 1 VAX-11 (Computer) 1