When I see 13-10 combination I always think CR-LF.
So today is CRLF-day.
For the nerds, CRLF day happens this year in week 42 (don’t know if this is always so).
Which numbers (or combinations) do trigger you?
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Where I live it's 10/13
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So I assume you don’t have 13:10 == CRLF time either?
When I used a Teletype, I used CR first because the LF can occur while the carriage is returning.
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Oh yes, those were the days...
For the the youngsters.
In Douglas Adams' The Hitchhiker's Guide to the Galaxy, 42 is the "Answer to the Ultimate Question of Life, the Universe, and Everything," as calculated by the supercomputer Deep Thought over 7.5 million years.
Tom.... 
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Not always, sometimes it is in week 41.
Week number according to the ISO-8601 standard, weeks starting on Monday. The first week of the year is the week that contains that year's first Thursday (='First 4-day week'). ISO representation: 2025-W42
Date Week Number
13/10/2025 42
13/10/2026 42
13/10/2027 41
13/10/2028 41
13/10/2029 41
13/10/2030 41
13/10/2031 42
13/10/2032 42
13/10/2033 41
13/10/2034 41
13/10/2035 41
13/10/2036 42
13/10/2037 42
13/10/2038 41
13/10/2039 41
13/10/2040 41
13/10/2041 41
13/10/2042 42
13/10/2043 42
13/10/2044 41
13/10/2045 41
- Not all countries use the International standard.
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Yes, when AI is flavour of the month, it's easy to forget just what hard work it was to get into programming/coding 50-years ago.
The Teletype was the only interface I had as a student. What it was attached to was a mainframe somewhere on the campus. A "job", even a small program on punched cards took 24-hours only to find the full stop was in the wrong place.
It took weeks to create a program that drew a curve through some data points and involved learning to use FORTRAN. Now it's ten minutes on your laptop with Excel or five minutes with the WWW with suggestions how to do it.
Hi,
When I was at Uni, we had Fortran on cards that were run at a particular part of the day, when the Uni computer got online to Melbourne and Kronos. It also ran Cobol and Algol.
The computer room also had a "MiniComputer" with teletype interface that was running BASIC. It was single rack of equipment with the teletype beside it, all code was typed in and put to tape.
Used to use it to do Amateur Satellite predictions, when most Oscars were near circular orbit.
We also had in the engineering dept, the analog computer.
That is the actual one we used, from the Victorian State archives.
Tom....
Looks more like a telephone exchange than a computer. Spare parts in the drawers?
The breeze blocks look familiar. 1970's brutalism.
No, connecting cables, banana plugs, each of the blocks on the to panel were amplifiers, integrators, clamping circuits. All that analog processing stuff.
You used the plugs to connect them.
Output to a chart recorder.
Tom....
…and it was still common to send a NUL after the CR-LF combination, to be sure, particularly if you’d just printed a long line.