The Titan computer was the name given to the Atlas 2 developed by Ferranti and the University of Cambridge Mathematical Laboratory. It differed from the the Manchester Atlas by having a real, but cached, main memory, rather than the paged (or virtual) memory used in the Manchester machine. (The Titan main memory consisted of 128K of ferrite core store rather than part core part rotating drum-store as used on the Manchester Atlas) It also had two large hard-disk drives and several magnetic tape decks. As with the Manchester Atlas it used discrete components, in particular germanium transistors. Ferranti Limited was a major UK electrical engineering and equipment firm, known primarily for their defense electronics and power grid systems. ... The Computer Laboratory is Cambridge Universitys computer science department. ... The Atlas Computer of the University of Manchester became operational in 1962, having been a joint development between the University, Ferranti and Plessey. ...

As a prototype it had a reputation for technical excellence and ran an early and very successful multi-user time-share system; but it was also often highly unreliable, and indeed some wiring anomalies were still being discovered several years after it was first commissioned. One of its most intensive uses was to compute the inverse Fourier Transforms of data from the One-Mile Radio Telescope.

There was one other Atlas 2 built, which was also in Cambridge, at the Ministry site on Madingley Road.