readmetc -- tty/termcap/readme
ttyc.ctc -- tty/termcap/tty.c
ttydef.htc -- tty/termcap/ttydef.h
ttycbd.ctc -- tty/termcap/ttykbd.c

*sb -- sys/bsd/*
*se -- sys/enunice/*
*so -- sys/osk/*
*sv -- sys/sysv/*

makes? --> sys/[bsd,eunice,osk,sysv]/Makefile