Upper Memory Area - Dell Inspiron 3500 System Reference Manual

TSR
Abbreviation for terminate-and-stay-resident. A TSR program runs "in the background." Most TSR programs implement a predefined key
combination (sometimes referred to as a hot key) that allows you to activate the TSR program's interface while running another program. When you
finish using the TSR program, you can return to the other application program and leave the TSR program resident in memory for later use.
®
Because MS-DOS is not designed to support multiple programs running simultaneously, TSR programs can sometimes cause memory conflicts.
When troubleshooting, rule out the possibility of such a conflict by rebooting your computer without starting any TSR programs.
U
UL
Abbreviation for Underwriters Laboratories.
UMB
Abbreviation for upper memory block.
upper memory area
The 384 KB of RAM located between 640 KB and 1 MB. A utility called a memory manager can create UMBs in the upper memory area, in which
you can load device drivers and memory-resident programs.
UPS
Abbreviation for uninterruptible power supply. A battery-powered unit that automatically supplies power to your computer in the event of an
electrical failure.
USB
Abbreviation for Universal Serial Bus. A USB port provides a single connection point for multiple USB-compliant devices such as mice,
keyboards, printers, and computer speakers. USB devices can be connected and disconnected while the system is running.
UXGA
Abbreviation for ultra extended graphics adapter.
V
V
Abbreviation for volt(s).
VAC
Abbreviation for volt(s) alternating current.
VCCI
Abbreviation for Voluntary Control Council for Interference.
VDC
Abbreviation for volt(s) direct current.
VESA
Acronym for Video Electronics Standards Association.
VGA
Abbreviation for video graphics array. VGA and SVGA are video standards for video cards and controllers with greater resolution and color
display capabilities than previous standards.
To display a program at a specific resolution, you must install the appropriate video drivers and your monitor must support the resolution. Similarly,
the number of colors that a program can display depends on the capabilities of the monitor, the video controller and its drivers, and the amount of
video memory installed in the computer.