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UNITS OF STORAGE IN
    COMPUTER
   Adetayo Ayodele A.
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.
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
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.
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.
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.
Thank you.
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Units of storage in computer

  • 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.