Second Generation Mainframes: The IBM 7000 Series: Kaisler

The Second Generation

Citation-333999333 Ris

When was the first time you used a computer, and how big was it? - Quora

Computing at Columbia Timeline

Stephen H. Kaisler - Computers & Internet: Books

Second Generation Mainframes: The IBM 7000 Series : Kaisler

IBM 700/7000 series - Wikipedia

IBM mainframe tube module part II: Powering up and using a 1950s key debouncer

Airborne Computing System Developments at Elliott-Automation, 1958–1988