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Data Units Flashcards
OCR GCSE J277 Computer Science specification
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Sign In to Track ProgressTerms in this set (10)
Bit
The smallest unit of data in computing, representing a binary value of 0 or 1.
Nibble
A group of 4 bits.
Byte
A group of 8 bits.
Kilobyte (KB)
1,000 bytes.
Megabyte (MB)
1,000 kilobytes or 1,000,000 bytes.
Gigabyte (GB)
1,000 megabytes or 1,000,000,000 bytes.
Terabyte (TB)
1,000 gigabytes or 1,000,000,000,000 bytes.
Petabyte (PB)
1,000 terabytes or 1,000,000,000,000,000 bytes.
Why is data stored in binary?
Computers use binary because they operate using electrical signals, which have two states: on (1) and off (0).
Order of data units (smallest to largest)
Bit, Nibble, Byte, Kilobyte, Megabyte, Gigabyte, Terabyte, Petabyte.
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