TR (man1p)
tr — translate characters
tr — translate characters
c99 — compile standard C programs
command — execute a simple command
echo — write arguments to standard output
uustat — uucp status enquiry and job control
val — validate SCCS files (DEVELOPMENT)
pr — print files
awk — pattern scanning and processing language
newgrp — change to a new group
delta — make a delta (change) to an SCCS file (DEVELOPMENT)