ADJSS MAITAMA ABUJA
SUBJECT: Computer Studies
TOPIC: Units of Storage in Computer
CLASS: JSS Two A, B, C and D
DATE: 6 November 2023
Duration: 80 Minutes
Definition of Computer Units of Storage
Units of storage in the computer are the denominators used to quantify the
volume of data or instructions in a computer or on a storage medium.
Data can be stored in the computer through several methods using varying
electronic components. Some of these components include Hard disk,
Compact disk, Flash drive, Floppy disk, Random Access Memory (RAM), etc.
Some units of storage in the computer include:
i. Bit (b): Bits is an acronym that stands for Binary digITS. It is the Smallest
Unit of data on a binary computer. A single bit consists of 0 (zero) or 1 (one).
ii. Nibble (nybble, nyble, or nybl): A nibble is a collection of four bits.
iii. Bytes (B): A byte consists of eight bits. It is the smallest item that can be
individually accessed by a program. It is the fundamental unit of storage on a
binary computer.
iv. Word: A word is a collection of 32 bits.
v. Kilobyte (KB): A Kilobyte consists of 210 (1,024) Bytes which is
approximately 1000 Bytes.
vi. Megabyte (MB): One Megabyte consists of 220 (1,048,576) Bytes.
vii. Gigabyte (GB): A Gigabyte is a collection of 230 (1,073,741,824) Bytes.
viii. Terabyte (TB): A Terabyte consists of 240 (1,099,511,627,776) Bytes.
ix. Petabyte (PB): A Petabyte consists of 250 (1,125,899,906,842,624) Bytes.
x. Exabyte (EB): An Exabyte consists of 260 (1,152,921,504,606,846,976)
Bytes.
xi. Zettabyte (ZB): A Zettabyte consists of
270 (1,180,591,620,717,411,303,424) Bytes.
xii. Yottabyte (YB): A Yottabyte consists of
280 (1,208,925,819,614,629,174,706,176) Bytes.
