Yeah, it never really got off the ground though because incentives weren’t aligned. Everyone wants you to sign up on their site for data hoarding reasons, not to use an identity from elsewhere.
More actual interaction between end-users and programmers makes the end-users better at reporting bugs and describing what they want (and at having an idea how complex a certain request actually is).
Because the multiple translations from customer wish to project manager language to backlog items are all lossy.
DOS programs generally were like command line apps today (but simpler, obviously). They did a thing, then exited. Or they showed their "TUI" (as we'd call it today), and when you told it to exit, you got back to the DOS prompt to start the next program.
TSRs were a special kind of program, that instead of telling DOS "I'm done, here's my memory back", said "I'm done for now, but don't unload me", so their memory stayed allocated/used. And you got your command prompt back immediately to continue your work.
TSRs usually hooked into an interrupt like the keyboard interrupt, intercepting a hotkey to re-activate the program (so you could browse your address book while you were in your (text mode) word processor; "kind-of" multitasking), or they offered a service to other programs (like the mouse and CD-ROM drivers).
There were all kinds of things that ran as TSRs. Virus scanners (hooking into disk write/reads), modem tools (showing "RING" in the corner of the screen when the modem detected an incoming call), note-taking apps, address books, you name it.
Despite being a German signal, DCF77 can be received all over Europe, except the northernmost parts of Norway, Sweden and Finland and for some reason, Crete.
The company behind rebranded to SUE.
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