To change focus during a shot; named for the flat gear called a “rack” (half of the rack-and-pinion focusing mechanism on old-style movie cameras). Chapter 5.
Computer memory chip; system memory. Appendix B.
Smoothly changing the playback speed of a clip; for instance, from normal speed to slow motion to fast motion and back again. Chapter 1.
Zigzag pattern painted by the electron beam as it scans the photosensitive phosphors on the inside face of a cathode ray tube (CRT). Chapter 3.
A shot that shows an actor's facial expression or body language in response to some dialogue or action. Chapter 5.