[TUHS] DECtapes under the UNIX room floor

[segaloco via TUHS]

On Wednesday, May 6th, 2026 at 10:25, Phil Budne via TUHS <tuhs at tuhs.org> wrote:

> John Cowan wrote:
> > See the '"Electronics" and "Computing" sections of
> > https://en.wikipedia.org/wiki/Jiffy_(time).
> 
> The "Computing" section is pretty light on history.
> 
> DEC had a long history of 60Hz "line time" or "mains" clocks.

Well and tying in UNIX, BTL and AT&T had much experience in the realm of AC generation of all kinds between ringing generators, lamp interruptors, magnetos, and so on.  Heck, BTL was even working on a real-time clock circuit for PDP-11s in the mid 70s:

https://www.tuhs.org/Archive/Documentation/TechReports/USG_Library/1048_A_Continuous_Service_RTC_for_Digital_Computers.pdf

- Matt G.