192px|thumb|right|An [[Octet (computing)|octet code page 866 font table ordered by nibbles.]]
In computing, a nibble,
In 1977, an early use of the spelling nybble for the term was recorded within the consumer-banking technology group at Citibank. It created a pre-ISO 8583 standard for transactional messages between cash machines and Citibank's data centers that used the basic data unit nabble.
In the early 1980s, the alternative spelling nybble reflected the spelling of byte, as noted in editorials of Kilobaud and Byte.
Historically, nybble was used in many cases for a group of bits greater than 4. On the Apple II, much of the disk drive control and group-coded recording was implemented in software. Writing data to a disk was done by converting 256-byte pages into sets of 5-bit (later, 6-bit) nibbles and loading disk data required the reverse.
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