I find it really cute that XON/XOFF are still with us, and people still marvel at the discovery from the deep dungeons of present time, since its pretty much everywhere in modern systems ..

Also of note, besides "TSTOP/TSTART" (^S/^Q) - as I knew it before XOFF/XON became the standard nomenclature courtesy of ASCII (X = Transmission), is of course the good ol' ^L, which is affectionately known as the boss-key in some parts. Life can't persist without some ^M and ^N business as well, and lets never forget the favourite "wake up your co-worker and go get coffee", ^G, although for some this may require your terminal have a buzzer or other suitable charge-based co-worker wake-up circuitry.

Well, I'm sure there are more in the alphabet to discover, but I'll just leave you here with the reminder that ^C and a few others of the happy little family of ^W control sequences are really but a few bytes away. ^Z