.\" %sccs.include.proprietary.man% .\" .\" @(#)ctrademarks 6.2 (Berkeley) 04/17/91 .\" .so /k3/unx/MACROS/cmac1.1 .VM 20 20 .P UNIX is a trademark of AT&T Bell Laboratories .P 3B is a trademark of AT&T Technologies. .P PDP and VAX are trademarks of Digital Equipment Corporation.