File format § Magic number

List of file signatures

Magic (programming)

NaN (Not a Number)

Hexspeak, for another set of magic values

Nothing up my sleeve number about magic constants in cryptographic algorithms

Time formatting and storage bugs, for problems that can be caused by magics

Sentinel value (aka flag value, trip value, rogue value, signal value, dummy data)

Canary value, special value to detect buffer overflows

XYZZY (magic word)

Fast inverse square root, using the constant 0x5F3759DF

image magic number

define magic number

wikipedia magic number

weblio magic number

kotobank magic number

jisho magic number