This document outlines key developments in film editing techniques from early cinema pioneers to modern digital editing. It discusses pioneers like Lumieres, Melies, and Porter and the editing styles they used - pre-editing, in-camera editing, and splicing. Continuity and alternative/surreal editing styles are defined. Technological developments that enabled editing are described, from early tools like splicers and Moviolas to digital tools like Avid and Final Cut Pro. The purpose of editing and how it manipulates time, space, and rhythm in sequences is also explained.