Random-access
memory (RAM /ræm/)
is a form of computer
data storage. A random-access memory device allows data
items to be read and written in approximately the same amount of time,
regardless of the order in which data items are accessed.[1]
In contrast, with other direct-access data storage media such as hard disks,
CD-RWs,
DVD-RWs
and the older drum
memory, the time required to read and write data items varies
significantly depending on their physical locations on the recording medium,
due to mechanical limitations such as media rotation speeds and arm movement
delays.