Digital Equipment 300 Series AXP Reference Manual page 301

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.
TURBOchannel extender
See expansion box.
two-dimensional graphics
Images that are displayed on the screen in 2D. These
graphics require the use of the HX 8-plane smart frame buffer
TURBOchannel graphics option or the TX 24-plane color 2D
option, which supports motion video.
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 block 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.
volatile memory
Memory from which values are lost when the system is turned
off.
WAN
See wide-area network.
Glossary–29