DOS 19 Computer science 8 Operating systems (Computers) 8 Operating systems 6 Operating system 5 Word processing 5 Windows 4 Artificial intelligence 3 Computer Science 3 Computer programming 3 Computers 3 History 3 Latin American poetry 3 MS-DOS 3 Software 3 ADVANCED DOS 2 Civilization 2 Computers-- BASIC-- COBOL-- FORTRAN-- C-- SQL-- ORACLE-- DOS--CPM-- UNIX-- Library Network-- Digital Library-- Internet-- Telecommunications-- Information Services-- 2 DTP 2 Digital Microcomputers or Microprocessors; Computer science 2 Fuzzy systems 2 Guide 2 Internet 2 Mathematics 2 Modernism (Literature) 2 Neural networks (Computer science) 2 Technological forecasting 2 Translations into English 2 ARRAYS IN QUICKBASIC 1 ASCII code 1