octal
Zero through seven
Octal refers to a base-8 number system using digits 0 through 7.
Used in computing as a compact way to represent binary data, since each octal digit corresponds to exactly three binary digits: The Unix file permission 755 is octal notation.
Less common now than hexadecimal, but still appears in legacy systems and certain programming contexts.
Numerical system's base
- eightNumber after seven
- digitsSingle-place numerals
- numerationAssigning numerical values
- positionalRelating to placement
notation · quaternary · duodecimal · representation · arithmetical · integer · fractional
Unix permission modifier
- permissionsOfficial allowances granted
- UnixMultitasking operating system family
- minicomputerMedium-scale computing machine
- assemblyConstructing from components
machine-code · register · mainframe · byte · dump · debugger · filesystem · programming
Electronic character encoding standard
- backslashLeftward-slanting diagonal character
- nullAbsence indicator in code
- newlineText formatting character
- representationDepiction or likeness
Mathematics of basic operations
- additionJoining quantities mathematically
- subtractionRemoving quantities mathematically
- multiplicationProduct-finding operation
- divisionSplitting into parts
conversion · algorithm · computation · carry · borrow · complement · modular · logarithm
radix
Numerical system's base
- eightNumber after seven
- digitsSingle-place numerals
- numerationAssigning numerical values
positional · notation · quaternary · duodecimal · representation · arithmetical · integer · fractional
chmod
Unix permission modifier
- permissionsOfficial allowances granted
- UnixMultitasking operating system family
- minicomputerMedium-scale computing machine
assembly · machine-code · register · mainframe · byte · dump · debugger · filesystem · programming
ASCII
Electronic character encoding standard
arithmetic
Mathematics of basic operations
- additionJoining quantities mathematically
- subtractionRemoving quantities mathematically
- multiplicationProduct-finding operation
division · conversion · algorithm · computation · carry · borrow · complement · modular · logarithm · exponent
- numbersone, two, four, three, 0
- number systemsdecimal, binary, hexadecimal, Roman numerals, Arabic numerals
- eight prefixoctuplet, octane, octillion, octonary, octagram
- encodingcipher, UTF-8, encryption, binary, ASCII
- notationsmusical notation, mathematical notation, decimal notation, scientific notation, dance notation
- number formatsinteger, decimal, binary, percentage, hexadecimal
octaldecimal
Tenths-based notation
hexadecimal · binary · duodecimal · ternary · quaternary
- giant octopusOversized eight-limbed sea creature
- October surpriseLast-minute campaign revelation
- blue-ringed octopusLethal spotted sea creature
- Doctor Octopus
- Dr. OctopusTentacled scientific nemesis
- grilled octopusHeat-prepared tentacled mollusk
octopus, October, octagon, octave, octagonal, octet, octogenarian, octahedron, octahedral