.PS 8.5i
.ps 20
boxht = 4*boxht/5
## figure T-16
B1:	box "NETWORK SERVICES (CLNP AND ES-IS)" "" "[U.~WISCONSIN]" \
		width 3*boxwid
##
B2:	box "TRANSPORT SERVICES" "" "[U.~WISCONSIN]" width 3*boxwid \
		with .s at B1.n
##
B3:	box "SUBNETWORK SUPPORT (802.x AND X.25)" "" "[U.~WISCONSIN]" \
		width 3*boxwid with .n at B1.s
##
.PE