The "Chronological file" is a complete record of all documents submitted in evidence during the trial. Much of the material in this series duplicates records in Series I - but the "Chronolog​ical file" is more complete. The records from 1935 to 1950 are particularly valuable as they describe the origins and evolution of most of the early computer projects. There are reports describing John Atanasoff's computer and letters which trace his unsuccessful attempts to sell his machine to IBM and Remington Rand during the 1930s and 40s.

The chronological file also contains documentation on the computer projects sponsored by National Cash Register, IBM, MIT, and Harvard University during the late 1930s and early 1940s. The records show that IBM provided considerable support to Harvard's Computation Laboratory run by Professor Howard Aiken. During this period National Cash Register with the support of the United States War Department was attempting to develop an electromechanic​al calculator, which the Army hoped to use to compile firing tables. This project was headed by Joseph R. Desch. The records also document MIT's famous Whirlwind Project which evolved out of a Navy contract to build an analog computer for a programmable flight trainer.

The middle boxes of the chronological file describe the various UNIVAC computers developed between 1952 and 1969. The records trace the process by which Remington Rand continually lost ground to IBM during the 1950s and 60s. The final 25 boxes of the chronological file describe Sperry's efforts to secure, license, and defend the ENIAC patent and the events leading up to the lawsuit.