Shooting script
Also: production draft
A shooting script is the production-locked version of a screenplay, with every scene numbered and revisions tracked, used by the crew to plan and shoot the film. Unlike a spec, it carries scene numbers, locked pages, and coloured revision pages so the whole production references one stable document.
When a script goes into production it is "locked": scene numbers are fixed so that everyone — camera, props, scheduling — can refer to "Scene 47" and mean the same thing even as pages change.
From lock onward, changes are issued as coloured revision pages with revision marks, rather than by reprinting the whole script. The shooting script is therefore a living document with a strict change-control discipline, which is the opposite of a spec's clean read.