jargon.artrocity.com
New Hacker's Dictionary the Jargon File v 4.4.6
[very common] In reference to software, source is invariably shorthand for ‘source code’, the preferred human-readable and human-modifiable form of the program. This is as opposed to object code, the derived binary executable form of a program. This shorthand readily takes derivative forms; one may speak of “the sources of a system” or of “having source”.