As the now retired CE of a CBS affiliate, my memories of the PDP-11/23 were far less impressive.
CBS bought a few pallets of them, and wrote the control schedule program in pascal that had to be compiled each time it was re booted, for the main network dish, a 7 meter monster from Scientific Atlanta, that was on a turning post Az-Ell mount, used 5 HP Roland jackscrews to move it, very precise and expensive waveguide switches to swap polarities instantly and even had a motor to fine tune the polarity.
The compile requirement was because they could, over the closed caption facility (it has more data that just closed captions) download updated source code to it, and rebuilding it at boot time then installed the new version of the control program.
But it crashed, at first maybe once a week, and the missed satellite switches (no crash alarm so we, unless privy to the schedule) were airing the wrong commercials, pet food in place of toothpaste etc. When the logs showed that we aired the wrong commercial, we of course didn't get paid for that, costing us money.
So we called DEC, who had a couple of recipe followers in the Morgantown WV office and who could usually get around to servicing the maintenance contract in 3 or 4 days. We were precluded from doing anything but reboot it, and the contract said 12 hours, but it was interpreted as 12 business hours, not wall time.
DEC's people replaced everything in that PDP-11 except the frame rail carrying its serial number. Over about 2 years the crashes got worse until it was 4 to 6 times a day.
Our losses got to the point that I asked the guru at CBS if he had a test mule so he could also test hardware the stations sent in as some of it was made in Canada, and customs to ship it back and forth officially didn't have a quarter to call anybody that might give a shit that it was sitting in the border lockup because FEDEX or UPS or us, hadn't crossed a t correctly. 10 grand a day cost to us meant diddly to them. So most of us, who had to send something back for factory repairs, sent it through NYC and CBS, who apparently had the fine art of filling out the many pages of paperwork to get it through customs down pat.
So I called CBS & said this is bull shit, get me a PDP-11 that Just Works(TM). Hugo had DEC move my serial number to his place in NYC, and moved his serial number to us.
His machine did Just Work(TM). The only thing we didn't exchange was the hard drive, a 10 megabyte monster, which because of a paperwork snafu at install time, had a custom satellite location table that because CBS could phone it up, they had helpfully 'fixed'. The second time I called Hugo and got instructions as to how to make that file immutable. The only time I was ever in it as root. Each time was about 2 days putzing to find and mark the locations of all the satellites again because you had to do that sort of thing in off network time. Major PIMA.
But, Hugo then had no test mule as he couldn't even get it to fully boot before it crashed. DEC in NYC was no more help than my local DEC office was, so CBS had no choice but to replace all of them with IBM industrial rated machines, on their nickel at about 10G's a station by the time they'd had much more capable software written. And it, like most IBM stuff, only got rebooted after a power failure from then on.
DEC field engineering, just the phrase running through my mind makes me recall the totally incompetent people they had in their field offices, most doubled as sales force, were hired because they could sell. Totally clueless on a service call, they kept records of course, which is how we finally knew everything but that frame rail (and the outside slip on case) had been changed. But every time they left, saying it should be fixed, the time to crash was cut in half.
Miss DEC? Its like remembering broken bones, I'd druther not.
No Cheers this time, Gene