Glossary 161
Shadow RAM
A write-protected area of RAM that contains a copy of the BIOS. As the computer
boots, the BIOS is copied from its permanent location in ROM to RAM. The
BIOS can be executed much faster in RAM than in ROM. The BIOS remains in
shadow RAM until you turn off the computer.
TFT (thin film transistor) LCD
A TFT LCD uses a separate transistor circuit to control each pixel. This
technology provides the best resolution for an LCD screen. A TFT LCD is also
sometimes called an active matrix LCD.
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