0day: Computer threats that take advantage of newly released software and software patches.

adapter card: A circuitry board that, when added to a computer internally, increases that computer’s capabilities; also called an expansion card.

Aero: A Windows color scheme and window format that was new to Vista.

Aero Glass: A combination of the Aero color scheme and the Glass effect that creates a translucent effect in Windows.

AGP: Accelerated Graphics Port; a type of computer video expansion.

all-in-one: A type of inkjet printer that can also act as a scanner, fax machine, and/or copier.

alpha blending test: A test that Microsoft uses to determine how quickly a computer's graphics card can blend colors.

application: A kind of software used for productivity or to create things (the software that does the work).