Collection of about 100 papers by various authors. Some of the topics discussed are: billing for timesharing, external signal processing, cellular logic, computers in transportation systems, communications systems, computer-aided design of computers, fault diagnosis, microprogramming techniques, teleprocessing, memory mapping techniques, system measurement techniques, central processing technology, virtual computer systems, mini-computer applications, hardware and language, etc. Following is a list of titles and authors: Trade-Offs in Time Sharing Pricing. By Weston Burner. Efficient Computer Structures for the FFT Algorithm. By B. Gold. Fast Fourier Transform Algorithms for the Control Data Star Computer. By W. E. Glass. Signal Processing Applications of the Fast Fourier Transform. By T. Bially. FFT Programs for the IBM System and 360/91. By Norman Brenner FFT Algorithm. By D. N. Graham. Fast Digital Processor. By C. Rader. MIRAGE, A Microprogrammable Interactive Raster Graphics Equipment. By William P. Lidinsky. System with Progrmmable Hardware. By Mario R. Schaffner. Hardware-Aided Approach to Content-Addressing in Data Bases. By G. F. Coulouris, J. M. Evans and R. W. Mitchell. Performance Measurement and Tuning for System/360. By David N. Freeman. Gaining Software Visibility Using Instrumentation Tools. By C. W. McGuffie.