Audio: Set of jacks to plug in speakers, headphones, microphone, etc.
CMOS (Complementary metal–oxide–semiconductor) Battery: small battery used to hold settings in BIOS, primarily the date & time.
BIOS (Basic Input Output System) aka Setup: A chip on the motherboard which displays information about the computer and has some user-editable settings.
IDE (Integrated Device Electronics) aka PATA (Parallel ATA): also known as "ribbon cable." Can plug two devices into one cable. (See Master/Slave.) If only plugging one device into an IDE cable, always use the far end and not the middle.
SATA (Serial ATA): Newer style than IDE/PATA. Can only attach one device per cable. Usually faster.
ATA (Advanced Technology Attachment): refers to an attachment which was "Advanced" back in the days of the PC-AT computer, but now is standard.
Capacitor (or "Cap"): A component soldered into virtually all motherboards and many other Printed Circuit Boards. Must look at to see if they're broken.
CPU (Central Processing Unit): The "Brain" of the computer.
Expansion Cards: Used to expand or enhance computer's capabilities.
As much as an hour before the class begins, you can print out 8-10 copies of this page: Command Line: Essentials. Students often feel less anxious when they know they can refer to this later (so they don't have to write everything down).