We also have a LGP-30 on display at the Computer History Museum. Marc
> On Aug 15, 2024, at 4:49 PM, Rick Bensene via cctalk <[email protected]> > wrote: > > Mark L. wrote concerning the LGP-30 computer in the LCM+L/Paul Allen > Auctions: > > >> I dare to bet it's the last one. Anywhere. > > > > It isn't the last one by any means. There are a few of these machines still > around. Here are links to a few that are in collections: > > > > https://www.technikum29.de/en/computer/lgp30.php > > https://t-lcarchive.org/lgp-30/ > > http://computermuseum.informatik.uni-stuttgart.de/dev_en/lgp30/lgp30.html > (was known operational in 2007) > > https://arstechnica.com/information-technology/2022/11/redditor-discovers-legendary-1956-computer-in-grandparents-basement/ > (Found in 2022) > > > > The LGP-30 was designed by Nuclear Physicist and Manhattan Project Team > Member Stanley Frankel, who also designed > > a number of electronic calculators, including the SCM Cogito 240/240SR and > the Diehl Combitron. > > > > An amazing thing about the LGP-30 is its relative simplicity(compared to > contemporaries of the time), relying heavily on the aspects of its magnetic > drum-based memory to hold the working registers as well as program storage > for the machine. This means that the machine has very few flip-flops > (requiring vacuum tubes), and uses a large number of inexpensive > semiconductor diode logic gates for data routing and control functions. > > > > They weren't fast by any means, but were inexpensive and reliable, and > required no special power or cooling, making them very popular in a wide > variety of settings, from military to business. Quite a large number of them > were made, and fortunately, some have survived to this day. I don't know if > any of the machines that still exist are actually in running condition today, > but there were a few of them that were known to be running in the decade of > 2000. > > > > Rick Bensene > > The Old Calculator Museum > > https://oldcalcultaormuseum.com > > Beavercreek, Oregon USA
