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Try It Out #Critical Thinking

Complete the chart given below.

Computer Memory

Secondary
Memory

ROM Memory
cards
EEPROM

MEASURING THE COMPUTER’S MEMORY
A computer can only understand binary language. It processes and stores data and

instructions in the form of binary language. A binary language consists of 0’s and 1’s called
binary digits bits.
or
A bit is the smallest unit of information which a computer can process and store. A group of
4 bits is called a nibble and a group of 8 bits is called a byte . A computer memory is stored
in the form of bits and bytes. Every computer has a certain amount of memory.

The memory capacity of a computer determines how much data can be stored in the
computer.

There are other higher units of measuring
memory as given below. Tech Et ique e

10
1024 (2 ) bytes = 1 Kilobyte (KB) ¨ Never write with a pen or pencil
10
1024 (2 ) KB = 1 Megabyte (MB) on a disc. Never push the pen
drive inside the USB port. Use all
10
1024 (2 ) MB = 1 Gigabyte (GB)
the storage devices carefully.
10
1024 (2 ) GB = 1 Terabyte (TB)

Flashback Time

¨ The storage capacity of a computer is called its memory. Computer memory is used for
storing data and instructions.

¨ A bit is the smallest unit of information which a computer can process and store.
¨ A group of 4 bits is called a nibble and a group of 8 bits is called a byte.
¨ Computer memory is of two types – primary memory and secondary memory.

¨ Primary memory is of two types – RAM and ROM.
¨ ROM is of three types – PROM, EPROM and EEPROM.
¨ Secondary memory devices are hard disk, CD-ROM, DVD, pen drive, Blu-ray disc and
memory cards.

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