(2)(n.) Video capture refers to storing video images in a computer.

(3)(n.) The recording of keystrokes during the definition of a macro.

(4) (n.) In a biometric security system, the process of acquiring a biometric sample from a user.

Biometric Consortium 
Extensive collection of information pertaining to the research, development, testing, evaulation, and application of biometric-based personal identification/verification technology. The Biometric Consortium serves as the U.S. Government's focal point for this technology.

A Practical Guide to Biometric Security Technology
Should your company use biometrics? And, if so, which ones should you use, and how do you choose them?