The AEG-Telefunken TR 440 Computer: Company and Large-Scale Computer Strategy
Eike Jessen, Dieter Michel, H.-J. Siegert, Heinz Voigt · IEEE Annals of the History of Computing · 2009
AEG-Telefunken began developing computers in 1957. By 1974, 46 of its TR 440s were installed, with a total retail value of more than US$250 million. At its start, the TR 440 was the fastest computer ever designed in Europe, with system software features far ahead of its competitors. Nevertheless, computers were not a strategic product for AEG-Telefunken, and the TR 440's development faced substantial difficulties.