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RAM
Random Access Memory. The portion of the computer’s
memory used to run programs and store data while you
work. All data stored in RAM is erased when you turn off or
reset the computer; so you must store any data you want to
keep on disk.
Read
To copy data from one area to another. For example, when
you open a text file stored on disk, the computer reads the
data from the disk and displays it on the screen.
Read/write head
The physical device inside a disk drive that reads data from
and records data on the magnetic surface of a disk.
Real-time clock
A battery-powered clock inside the computer that keeps track
of the time and date, even when the computer is turned off.
Reset
To reload a computer’s operating system so you can retry a
task or begin using a different operating system. Resetting
erases all information in RAM.
RGB
Red Green Blue. A type of color monitor.
ROM
Read Only Memory. A portion of memory that can only be
read and cannot be used for temporary storage. ROM retains
its contents even when you turn off the power.
Glossary 15