Input-output analysis 13 Computer input-output equipment 9 Input-output tables 4 Output 4 Computer engineering 3 Economics 3 Input 3 Input and output 3 input-output analysis 3 Computer 2 Computer conferencing 2 Computer memory 2 Computer networks 2 Computer software 2 Control flow 2 Digital techniques 2 Functions and program structure 2 Inflation 2 Information technology 2 Interactive multimedia 2 Laser light 2 Microcomputers 2 Operating systems (Computers) 2 Programming 2 Signal processing 2 Social classes 2 Technological innovations 2 Terms of trade 2 The UNIX system interface 2 The laser output 2