|WikiProject Computing / Early||(Rated Start-class)|
The 7090 was the first to bear the new 4-digit IBM model numbers. Rumor has it that originally, this transistor version of the vacuum-tubes 709 was to be named 709T, which was pronounced "seven-oh-nine-tee", and thus gave someone the idea to call it seven-oh-ninety, i.e. 7090.
I believe that rumor to be true. One of my jobs in 1959, at IBM Service Bureau, was to upgrade the IBM 705 program that held the equipment inventory, from 3-digit fields, plus a one-letter type designator (as "T"), to 4-digit fields, and I believe a two-or-three character type designator. That meant we had to invade the card-sequence number field (cols. 73-80), making reversal to a card-based inventory risky. But we and management were brave. Gio @ stanford. —Preceding unsigned comment added by 18.104.22.168 (talk) 22:49, 14 December 2007 (UTC)
Stanford University 7090
The memory system of the 7090 had a local control which included a storage clear button. The machine at Pine Hall was placed so that the memory was towards the rear but the computer operator could be glimpsed by a double reflection. When a certain unpopular programmer had dedicated machine time, one of his enemies would sometimes wait until he heard the card to tape operation finish. The core was then placed in local mode and cleared while the CPU was stalled waiting for the input tape to rewind. If the programmer/operator became suspicious his approach could be detected by watching the reflection in the glass panel which covered the core stack.Rdmoore6 (talk) 22:05, 18 December 2008 (UTC)
Goddard Space Flight Center, NASA
IBM had the contract to operate the 7094s at Goddard during the Apollo Missions thru Apollo 12. One of the most frequent programs ran on these computers were differential correction. Each run took about 2.5 hours to run, which was great for a computer operator going to college. The console of the 7094 could be used to spread out books while doing homework during a differential correction run. —Preceding unsigned comment added by Afoster5728 (talk • contribs) 14:01, 28 February 2009 (UTC)
Wright-Patterson AFB system
The research labs at Wright-Patterson AFB had a pair of systems, one 7090/7040 lashup, and one 7074/7044 lashup, in the 60s. Played on them quite a bit as a co-op back then.
In the early 70s I worked with a guy at RCA Camden who had been involved with the initial programming the BMEWS computers. Apparently the software was stored in E-core wire ROMs rather than being loaded from media, making debugging and bug fixing a royal PITA. drh 16:17, 10 August 2007 (UTC)
"Daisy" anachronism ??
Our "Notable applications" section says "Daisy" was first perform on a 7094 in 1961, but the earlier section says the 7094 was first installed in September 1962. A YouTube video here also claims a 7094 did it, in 1961. I presume a 7090 might have done it, as they were essentially compatible, assuming speed was not a problem. But can anyone resolve the issue? We could remove the inconsistency from the article by changing 7094 in the daisy item to "7090-series", but that still leaves the possibility that the Sept 1962 date is incorrect for the 7094. Wwheaton (talk) 01:30, 8 September 2010 (UTC)
- I see now that our IBM 704 article claims the song was done on a 704, not a 7094, in 1962 at Bell Labs, based on this 1997 www source at Bell Labs. Our 7090 article here has a www external link to Decca Records DL 9103 here, but it claims it was done at Bell Labs in 1960, on a 7090. Wwheaton (talk) 01:51, 8 September 2010 (UTC)
Re: Notable applications: JPL
I worked in SFOF at JPL on Mariner 4 in both "bus" operations and computing, and I'm pretty sure the 7094's on the 2nd floor of SFOF were twin 7094-7044 DCS (Direct Coupled System), not what is stated in IBM_7090#Notable_applications. (I personally didn't know of any other 7094's at JPL.) John Navas (talk) 22:45, 22 February 2011 (UTC)
There is a request for citation regarding the name.
I have always heard it pronounced "seventy-ninety" despite the origins of the number as the 709-T (transistorized). I have no citations, though.