.PS 7.5i
.ps 20
## figure 7
B1:	box dashed "SESSION SERVICES" width 2*boxwid
B2:	box "\xx REMOTE" "\xx OPERATIONS" with .sw at B1.nw
B3:	box "\xx RELIABLE" "\xx TRANSFER" with .sw at B2.se
B4:	box "APPLICATION" with .sw at B2.nw width 2*boxwid
##
B5:	box dashed "SESSION SERVICES" width 2*boxwid \
		with .sw at (B1.se.x+3*linewid/2, B1.se.y)
B6:	box "REMOTE" "OPERATIONS" with .sw at B5.nw width 2*boxwid
B7:	box "APPLICATION" with .sw at B6.nw width 2*boxwid
##
.PE