Plan 9 from Bell Labs’s /usr/web/sources/contrib/fgb/root/sys/src/cmd/4th/4th.proto
# 4tH 3.5b - Forth 386 - sys sys bin - sys sys 4th - sys sys sys - sys sys man - sys sys 1 - sys sys 4th - sys sys src - sys sys cmd - sys sys 4th - sys sys + - sys sys