A program specification is the definition of what a computer program is expected to do. It can be informal, in which case it can be considered as a blueprint or user manual from a developer point of view, or formal, in which case it has a definite meaning defined in mathematical or programmatic terms.
... at an average density of 485.1/km² (1,260.4/mi²). The racial makeup of the town is 95.82% White, 0.50% African American, 0.04% Native American, 1.49% Asian, ...