usr/man/man0/toc4

.xx "bk" "line discipline for machine-machine communication"
.xx "cons" "VAX-11 console interface"
.xx "dh" "DH-11 communications multiplexer"
.xx "drum" "paging device"
.xx "dz" "DZ-11 communications multiplexer"
.xx "fl" "floppy interface"
.xx "hp" "RP06, RM03, RM-05 moving-head disk"
.xx "ht" "RH-11/TE-16 magtape interface"
.xx "kl" "KL-11 or DL-11 asynchronous interface"
.xx "lp" "line printer"
.xx "mail" "pseudo-device for mail notification"
.xx "mem" "main memory"
.xx "newtty" "summary of the ``new'' tty driver"
.xx "null" "data sink"
.xx "rk" "RK-11/RK07"
.xx "rv" "Racal/Vadic ACU interface"
.xx "tm" "tm11 magnetic tape driver"
.xx "tty" "general terminal interface"
.xx "up" "emulex sc21/ampex 9300 UNIBUS moving head disk"
.xx "va" "Benson-Varian interface"
.xx "vp" "Versatec interface"