It's approaching 17 years ago this month that I switched to #tmux.. and 17 years since I submitted my first #OpenBSD port. 
https://marc.info/?l=openbsd-ports-cvs&m=121226747005033&w=2
Nicholas Marriott (nicm@)'s first #OpenBSD commit would happen a year later. 
nicm@ modified src/usr.bin/tmux/*: Import tmux, a terminal multiplexor allowing (among other things) a single terminal to be switched between several different windows and programs displayed on one terminal be detached from one terminal and moved to another.
ok deraadt pirofti