<programming> The canonical minimal test message in the C/Unix universe or any of the minimal programs that emit this message.
Traditionally, the first program a C coder writes 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 bad.
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Nearby terms: hello « hello packet « hello, sailor! « hello, world » HELP » henry » HENSA