Computers Access control 198 Electronic data processing 186 Computer science 138 Computer networks 129 Computer security 111 Law and legislation 105 Information technology 103 Security measures 86 Internet 62 Microcomputers 57 Data processing 55 Computer software 53 Social aspects 49 Study and teaching 48 Telecommunication systems 37 Cryptography 35 Data encryption (Computer science) 35 Data protection 33 Electronic digital computers 33 Computer-assisted instruction 30 Circuits 29 Maintenance and repair 28 Moral and ethical aspects 28 History 26 Information Systems 25 Education 22 Examinations 22 Certification 21 Artificial intelligence 20