a) The process of editing using rapid retrieval (random access) computer controlled media such as hard disks, CD-ROMs and laser discs. Its main advantages are: allows you to reorganize clips or make changes to sections without having to redo the entire production and very fast random access to any point on the hard disk (typically 20-40 ms).

b) Nonlinear distinguished editing operation from the “linear” methods used with tape. Nonlinear refers to not having to edit material in the sequence of the final program and does not involve copying to make edits.

It allows any part of the edit to be accessed and modified without having to re-edit or re-copy the material that is already edited and follows that point.

Nonlinear editing is also non-destructive, the video is not changed but the list of how the video is played back is modified during editing.