Background of the 2N709 used in the CDC6600 supercomputer in the 1960s: https://cpldcpu.wordpress.com/2020/02/14/what-made-the-cdc6600-fast/ https://cpldcpu.wor

Background of the 2N709 used in the CDC6600 supercomputer in the 1960s: https://cpldcpu.wordpress.com/2020/02/14/what-made-the-cdc6600-fast/ https://cpldcpu.wordpress.com/2020/02/14/what-made-the-cdc66... https://www.computerhistory.org/revolution/digital-logic/12/329/1426 https://www.computerhistory.org/revolution/digital-logic/12/... The functionally similar NPN switching transistor to the ancient 2N709 is still available. Search for PMBT2369. Acronyms, BJT: Bipolar junction transistor