Pascal (Computer program language) 155 Programming 22 Computer programming 13 Data structures (Computer science) 12 Data processing 11 Structured programming 10 Microcomputers 7 IBM Personal Computer 6 BASIC (Computer program language) 5 Computer programs 4 Macintosh (Computer) 4 UCSD Pascal (Computer program language) 4 Apple II (Computer) 3 Computer graphics 3 Electronic data processing 3 Electronic digital computers 3 Numerical analysis 3 Object-oriented programming (Computer science) 3 Programming languages (Electronic computers) 3 Science 3 Business 2 C (Computer program language) 2 Computers 2 Debugging in computer science 2 Development 2 Mathematics 2 Operating systems (Computers) 2 Periodicals 2 ALGOL (Computer program language) 1 Abstract data types (Computer science) 1