Nibble

nybblehalf-byte4 bits4-bit registerfour bitsfour-bit unitshalfbyteHexitnamenibble/nybble
In computing, a nibble (occasionally nybble or nyble to match the spelling of byte) is a four-bit aggregation, or half an octet.wikipedia
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Hexadecimal

hex0x16
A nibble can be represented by a single hexadecimal digit and called a hex digit.
Each hexadecimal digit represents four binary digits, also known as a nibble, which is half a byte.

4-bit

four-bit44-
Four-bit computer architectures use groups of four bits as their fundamental unit.
A group of four bits is also called a nibble and has 2 4 = 16 possible values.

Byte

bytesBTB
In computing, a nibble (occasionally nybble or nyble to match the spelling of byte) is a four-bit aggregation, or half an octet.
Another origin of byte for bit groups smaller than a computers's word size, and in particular groups of four bits, is on record by Louis G. Dooley, who claimed he coined the term while working with Jules Schwartz and Dick Beeler on an air defense system called SAGE at MIT Lincoln Laboratory in 1956 or 1957, which was jointly developed by Rand, MIT, and IBM.

Binary-coded decimal

BCDbinary coded decimalpacked decimal
In 2014, David B. Benson, a professor emeritus at Washington State University, remembered that he playfully used (and may have possibly coined) the term nibble as "half a byte" and unit of storage required to hold a binary-coded decimal (BCD) decimal digit around 1958, when talking to a programmer of Los Alamos Scientific Laboratory.
The ten states representing a BCD decimal digit are sometimes called tetrades (for the nibble typically needed to hold them also known as tetrade) with those don't care-states unused named or pseudo-decimal digit ).

Numerical digit

digitdigitsdecimal digit
A nibble can be represented by a single hexadecimal digit and called a hex digit.

Group coded recording

GCRgroup-coded recordingGCR (4/5)
In the Apple II microcomputer line, much of the disk drive control and group-coded recording was implemented in software.
11 of the nibbles (other than xx00 and 0001) have their code formed by prepending the complement of the most significant bit; i.e. abcd is encoded as abcd.

4

Computing

computer technologycomputing technologyapplied computing
In computing, a nibble (occasionally nybble or nyble to match the spelling of byte) is a four-bit aggregation, or half an octet.

Bit

bitsbinary digitbinary digits
In computing, a nibble (occasionally nybble or nyble to match the spelling of byte) is a four-bit aggregation, or half an octet.

Octet (computing)

octetoctets8-bit
In computing, a nibble (occasionally nybble or nyble to match the spelling of byte) is a four-bit aggregation, or half an octet.

Computer network

networkcomputer networkingnetworking
In a networking or telecommunication context, the nibble is often called a semi-octet, quadbit, or quartet.

Telecommunication

telecommunicationscommunicationstelecom
In a networking or telecommunication context, the nibble is often called a semi-octet, quadbit, or quartet.

256 (number)

256
Sometimes the set of all 256 byte values is represented as a 16×16 table, which gives easily readable hexadecimal codes for each value.

Computer architecture

architecturearchitecturesCPU architecture
Four-bit computer architectures use groups of four bits as their fundamental unit.

Microprocessor

microprocessorsprocessorprocessors
Such architectures were used in early microprocessors, pocket calculators and pocket computers.

Calculator

pocket calculatorcalculatorselectronic calculator
Such architectures were used in early microprocessors, pocket calculators and pocket computers.

Pocket computer

pocket organizerPocket PC
Such architectures were used in early microprocessors, pocket calculators and pocket computers.

Microcontroller

microcontrollersMCUmicro-controller
They continue to be used in some microcontrollers.

Homophone

homophoneshomophonoushomophonic
The term 'nibble' originates from its representing 'half a byte', with 'byte' a homophone of the English word 'bite'.

English language

EnglishEnglish-languageen
The term 'nibble' originates from its representing 'half a byte', with 'byte' a homophone of the English word 'bite'.

Washington State University

Washington StateWashington State CollegeState College of Washington
In 2014, David B. Benson, a professor emeritus at Washington State University, remembered that he playfully used (and may have possibly coined) the term nibble as "half a byte" and unit of storage required to hold a binary-coded decimal (BCD) decimal digit around 1958, when talking to a programmer of Los Alamos Scientific Laboratory.

Los Alamos National Laboratory

Los AlamosLos Alamos Scientific LaboratoryLANL
In 2014, David B. Benson, a professor emeritus at Washington State University, remembered that he playfully used (and may have possibly coined) the term nibble as "half a byte" and unit of storage required to hold a binary-coded decimal (BCD) decimal digit around 1958, when talking to a programmer of Los Alamos Scientific Laboratory.

Kilobaud Microcomputing

KilobaudKilobaud MagazineMicrocomputing
The alternative spelling 'nybble' reflects the spelling of 'byte', as noted in editorials of Kilobaud and Byte in the early 1980s.

Byte (magazine)

BYTEByte MagazineByte'' magazine
The alternative spelling 'nybble' reflects the spelling of 'byte', as noted in editorials of Kilobaud and Byte in the early 1980s.