.tl '--''--'
.ps20
.sp 4.25i
.ce
UNIX PROGRAMMER'S MANUAL
.ps10
.sp |5i
.ft I
.ce
Seventh Edition
.ce
Virtual VAX\-11 Version
.sp |5.75i
.ce
December, 1979
.sp |9.2i
.ft R
.ce
Computer Science Division
.ce
Department of Electrical Engineering and Computer Science
.ce
University of California
.ce
Berkeley, California  94720