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H
H
Hat
HCF
HD
HDM
Hex
HF
HLL
Hog
HOL
Hop
HSM
HUS
Hz
Hello, World
  • interj. The canonical minimal test message in the C/UNIX universe.
  • Any of the minimal programs that emit this message. Traditionally, the first program a C coder is supposed to write in a new environment is one that just prints "hello, world" to standard output (and indeed it is the first example program in K&R). Environments that generate an unreasonably large executable for this trivial test or which require a hairy compiler-linker invocation to generate it are considered to lose (see X).
  • Greeting uttered by a hacker making an entrance or requesting information from anyone present. "Hello, world! Is the VAX back up yet?"