IBM 709 Dead
IBM 709
KindMachine
Introduced1958
Discontinued1962
StatusDead
ManufacturerIBM
ClassMainframe
PlatformVacuum tubes
Sourcebitsavers.org ↗
The last and greatest of IBM's vacuum-tube scientific machines — the platform the SHARE user group formed around, and parent of the transistorized 7090.
1960198020002020
Created by IBM
The 709 was IBM's valve-era scientific flagship — the machine the SHARE user group formed around in 1955 to swap software and pressure IBM. It was the first with hardware floating point standard.
The transistorized 7090/7094 succeeded it in 1959 and became the platform of CTSS — the first timesharing system — and of the IBSYS batch world.