IIT (Introduction To Information Technology)

Ma’m Sumaira

Types Of Memory

Two Types Of Memory:1)Volatile Memory

2)Non-volatile Memory

Volatile MemoryVolatile memory is a temporary memory

that loses its contents when the computer or hardware device loses power, if your

computer freezes or reboots when working on a program you lose anything that hasn't

been saved.

Non-volatile Memory

Non volatile memory is a permanently memory,

which does not lose the data when the device is

power down.

Types of computer memory

Computer memory is divided into two types:

1) Primary memory (RAM,ROM)2) Secondary memory (Punching Devices, Magnetic

tape, Floppy Disk)

PRIMARY MEMORY RAM(Random access memory):

RAM is typically loaded from the computer's hard disk, and includes data related to RAM is a

memory scheme within the computer system responsible for storing data on a temporary basis,

It is volatile in nature.. When the system is switched off, the RAM loses all stored information.

The data remains stored on secondary storage through, and can be retained when the system is

running again.

ROM (Read Only Memory)

ROM is a permanent form of storage. It is non-

volatile in nature, ROM stays active regardless of whether power supply to

it is turned on or off.

Secondary Memorysecondary memory is not directly

accessible by the computer. When a computer needs to run or execute an

application stored in secondary memory, it first brings it to primary

memory storage for a while, to control and carry out its execution.

Punch cardpunch cards stored instructions of

operation for machines. Early digital computers made punch cards popular as

data storage assemblies. Punched cards were used through most of the 20th century in what became known as the data processing industry; the use

of unit record machines.

Magnetic TapeMagnetic tape as a recording technique was invented in 1928. This formed the basis for

magnetic digital information storage.•Devices that record and play back audio and video using magnetic tape are tape recorders and video tape recorders. A device that stores

computer data on magnetic tape is a tape drive (tape unit, streamer).

•Magnetic tape revolutionized broadcast and recording. When all radio was live, it allowed

programming to be recorded.

Magnetic Tape

Floppy DiskA floppy disk, or diskette, is a

disk storage medium composed of a disk of thin and flexible

magnetic storage medium, sealed in a rectangular plastic carrier lined with fabric that removes dust particles.

Floppy disks are read and written by a floppy disk drive (FDD)

Floppy Disk