This book describes the development and marketing of the mainframe computers that succeeded D21, the first commercial computer from Datasaab. We travel back to 1965-75, a period when automated computing left the pioneering era and became radically different.
Bernt Magnusson, Bengt Magnhagen, and Harold Lawson describe in three papers the design of the CPU:s used in the D22 and the D23. It was in this period that IBM introduced the concept of disc storage. Kurt Widin describes how the D22 was furnished with discs and with improved tape memories. Gunnar Boström writes about other peripherals such as punched cards and line printers.
Data communication arrived, and Kjell Hagström reports on how the minicomputer D5 was used as a communication computer for the D22. The use of an operating system was something new and MK-Dirigent was developed as the D22 OS. This task was carried out by a group of 15 people and is described by Jan Nordling. Bengt Asker outlines the different programming languages developed for D22, and also mentions how Algol-Genius was implemented on Univac 1100.
Rolf Danielsson, Per Ekholm, and Stig Johansson write about training and documentation, and Sven-Olof Tuvlind and Birger Olsson present some applications.
Sven Ingelsson and others describe the changing and often dramatic sales activities, and three former D22 customers give their view on working relations with Datasaab.
Rune Nyman remembers how discussions with Sperry Univac led to a controlled run-down of Datasaab's mainframe operation and how resource was concentrated towards the growing minicomputer market.
Viggo Wentzel writes about Gunner Lindström, the founder of Datasaab and tells of Gunnar's pioneering work at Saab.