.fp 3 H .ps8 .ps16 .sp 3.0i .ce UNIX\s-4\v'-6p'\(rg\v'6p'\s0 TIME-SHARING SYSTEM .sp .75i .ps 18 .ce PROGRAMMER'S MANUAL .ps12 .sp |4.5i .ft I .ce Research Version .sp .4i .ce Tenth Edition, Volume 2 .sp .4i .ce October, 1989 .ps 10 .sp |9.5i-1 .ft R .ce AT&T Bell Laboratories .ce Murray Hill, New Jersey .bp .ll 4.8i .in .75i .hy 0 .vs 12p .ps 10 -- .sp |8i Copyright 1976, 1979, 1984, 1990, AT&T Bell Laboratories.