things that are ok even w/o 4.3:

beginners
dc
bc
edtut
ex/edit.tut
sed
awk XX
msmacros
memacros/intro.nr
memacros/ref.nr
troff
eqn (a system for typesetting mathematics) XX
tbl
bib
diction
rogue
trek
f77.tblqnms
f77IO.ms
lint
make
sccs
yacc
lex
m4
curses
cacm
uprog XX
implement
fp
quotas
fsck
sendmail
security
password
porttour
tremdesc.me
uucp/network