Computer programming 4 Pascal (Computer program language) 4 Word processing 4 C (Computer program language) 3 Database management 3 BASIC (Computer program language) 2 Electronic data processing 2 Microbiology 2 Probabilities 2 Problems, exercises, etc 2 Programming 2 Ada (Computer program language) 1 Anatomy 1 Apes 1 Apple computer 1 Artificial intelligence 1 Behavior 1 Biochemistry 1 Biology 1 Botany 1 C plus plus (Computer program language) 1 Calculus 1 Cell receptors 1 Chemistry 1 Chemistry, Physical and theoretical 1 Computer science 1 Computer-aided design 1 Computers 1 Congresses 1 Data processing 1