Actually, thinking back to 1985, Forth was a kind of variable name jailbreak for me at the time, because the 64 character identifier limit allowed me to start using readable names for things vs. the BASIC interpreter limitation of, I think, 8 characters at the time.
The functional approach was equally a jailbreak, as well as the possibility of using integer math.
The 6502 assembler I was using was a real challenge, with a limit of 6 character identifiers.
I hand typed in, yes, typed in the 6502 Forth kernel on paper that I mail ordered. Then saved it to cassette tape. Those were the days! 