Digital Equipment DEC 3000 Series Service Information page 424

TURBOchannel module
High-performance interconnection hardware that allows you to
use a variety of Digital and third-party graphics, multimedia,
and communications options. The TURBOchannel module is
a synchronous asymmetrical I/O channel that connects option
modules to the system module. With this connection, the system
module and an option module have read or write access to each
other, but option modules have no access to other option modules.
two-dimensional graphics
Images that are displayed on the screen in 2D. 2D graphics
require the use of the HX 8-plane smart frame buffer
TURBOchannel graphics option.
universal strain relief strap
A plastic strap used when connecting the monitor video cable
to the back of the monitor. The strap prevents the weight of
the cable junction box from pulling the cables out of the BNC
connectors.
user interface
The style of interaction between the computer and the user of
that computer.
video refresh rate
The speed at which the image on the screen is restored.
VMScluster system
A highly integrated organization of Digital's OpenVMS Alpha
systems that communicate over a high-speed communications
path. VMScluster configurations have all the functions of
single-node systems, plus the ability to share CPU resources,
queues, and disk storage.
volatile memory
Memory from which values are lost when the system is turned off.
WAN
See wide area network.
wide area network
A high-speed public or private data communications system that
connects multiple users in different geographical areas, such as
different cities or states. In a WAN, transmissions are carried
primarily over telephone lines.
window
An area on your monitor screen in which you can start, run, and
view a separate process. Windowing capability is supported by
both OpenVMS AXP and DEC OSF/1 AXP workstation software.
Glossary–24