Number of slide rules: 28.
In the middle of this decade electronic calculators began to become affordable to the general public, and the production of slide rules quickly declined. Dietzgen ended their slide rule production in 1972, and Post stopped obtaining slide rules from Hemmi in 1975. Unique, in England, ceases slide rule production in 1975. In July of 1976 the last slide rule manufactured by K&E was immediately donated to the Smithsonian Institution in Washington, D.C. Pickett ended its slide rule production one month later. In Germany, all production of slide rules by Faber-Castell ended by 1977, while Aristo and Nestler each ended their slide rule production by 1978.
Some notable technical developments: manned moon exploration, DRAM chip, floppy disk, ethernet, bar code, Magnovox Odyssey game and Pong; personal computers; pocket calculators (Oops!).
|1970||USSR Military||Slide Rule RL|
|1970-1980||Blundell Rules Limited||506 Academy Duplex|
|1971||Hemmi||Pocket Versalog II|