| In a
computer, memory
is used for temporary storage of data and programs.

There are several different types
of memory chip which may be found in a computer, and
often the size of memory of a computer may be increased
by adding more chips.
RAM is
usually bought as a DIMM
(as shown in the picture above) which can be plugged
directly into a motherboard to increase the memory size
of a computer.
RAM
stands for Random Access
Memory and is a memory chip which allows
data to be stored on it (written)
and accessed from it (read).
It is used for temporary
storage of data and programs.
RAM is volatile
- all data stored in it is lost
if the power is switched off.
ROM
stands for Read Only Memory,
and is a memory chip which only allows data to be read
from it, and will not allow data to be written onto
it. In other words, you cannot change the data stored
on ROM. It is used for permanent
storage of data and programs.
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