the.com/source code

means The human-readable instructions programmers write, which get translated into the machine code a computer actually runs.

from 'Source' traces to Latin surgere, 'to rise' — the point from which something springs. Paired with 'code' (from Latin codex, a book of laws or writing system), 'source code' emerged in computing vocabulary alongside 'object code' and 'machine code' as programming matured in the mid-20th century, distinguishing the original text a human writes from what the machine ultimately executes.