Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!seismo!husc6!cmcl2!rutgers!sri-spam!ames!ucbcad!ucbvax!YALE.ARPA!LEICHTER-JERRY
From: LEICHTER-JERRY@YALE.ARPA
Newsgroups: comp.os.vms
Subject: Re: UIS for Mvax workstations - what is it?
Message-ID: <8707210336.AA26845@ucbvax.Berkeley.EDU>
Date: Mon, 20-Jul-87 23:37:09 EDT
Article-I.D.: ucbvax.8707210336.AA26845
Posted: Mon Jul 20 23:37:09 1987
Date-Received: Wed, 22-Jul-87 04:09:32 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: 
Distribution: world
Organization: The ARPA Internet
Lines: 17


    I am in the dark as to the difference between GKS and UIS. Can anyone shed
    any light on this?

UIS (also known as VWS - VWS is the official product name, i.e., what you have
to order from SDC, and UIS is the facility name, i.e., the prefix used on
calls, like UIS$CREATE_TERMINAL) is a windowing and graphics system that is
specific to VAXStations running under VMS.  While this is not an exact
analogy, you can think of using UIS as making direct calls to RMS services.

GKS (Graphics Kernel System) is an industry-standard graphics interface.
There are implementations of GKS on a wide variety of graphics devices.  On
VAXStations, GKS uses UIS to actually write to the screen.  If using UIS is
like calling RMS directly, then using GKS is like writing FORTRAN PRINT and
FORMAT statements.
							-- Jerry
-------