The results are presented of the engineering and programming characteristics of one hundred twelve different electronic digital computing systems that have been developed since 1961. The report describes the application, numerical and arithmetic characteristics, input, output and storage systems, construction and checking features, power, space, weight, and site preparation and personnel requirements, production records, cost and rental rates, sale and lease policy, reliability, operating experience, and time availability, engineering modifications and improvements and other related topics concerning the computing systems. (Author).