1. UNITS OF STORAGE IN
COMPUTER
Adetayo Ayodele A.

2. OBJECTIVES
At the end of the lesson, the students should
be able to:
i. State the various units of storage and their
values.
ii. Differentiate between kilometer, kilogram
and kilobyte
iii. Distinguish between kilobyte, megabyte and
gigabyte.

3. Definition of Terms
i. Bit: This refers to the smallest unit
of information that can be stored in
a machine. A single bit can only
hold 1 and/ or 0.
ii. Nibble: a nibble is a collection of
four bits.
3 2 1 0

4. iii. Bytes: A byte consists of eight bits
and is the smallest addressable data
item on a microprocessor. The bits
in a byte are normally numbered
from zero to seven using the
convention shown below.
7 6 5 4 3 2 1 0
Note: A byte also contains exactly two
nibbles.

5. iv. Word: This is a term for the natural
unit of data used by a particular
computer design.
In a nutshell, word is a group of 16 bits.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Note: A word contains exactly two bytes or four
nibbles.

6. v. Double Word: A double word is exactly a pair
of word. Therefore, a double word quantity is
32 bits long .
• note: double word can be divided into a high
order word and low order word or four
different bytes or eight different nibbles.

7. Thank you.