ABS

Vacuum-formed plastic shell, often used for a hard skin around foam.

AMA

Academy of Model Aeronautics.

ARF

Almost Ready to Fly. A mostly prebuilt model.

CA

Cyanoacrylate ("crazy") glue.

CF

Carbon fiber. Tape, rods, tubes, spars. Light and strong!

Coroplast

Corrugated plastic, as in "Caution Wet Floor" signs. Not lightweight, but indestructible.

ESC

Electronic Speed Control. Throttle.

Foamie

Model made of (styro)foam, often preformed. "Flying beer cooler."

HUD

Heads-Up Display. (Easier to carry to the field than a TV, and brighter.)

LHS

Local Hobby Shop (as opposed to mail order).

Orientation

Which way the plane's pointing. If it's a silhouette, you can mistakenly think it's pointing the "other way," like the Necker Cube illusion.

Profile

Model that looks like a conventional plane only "in profile" because its fuselage is flat. Less drag, more aerobatic.

Rx

Receiver (of a radio signal).

Servo

Little box with a moving arm, which moves control surfaces on the plane.

Speed 400, -480, -...

Common sizes of electric motors. Bigger number means bigger motor.

Tx

Transmitter. What the pilot holds ("the sticks").
Also something on the plane sending data back to the ground station.

Onboard video: X10 CMOS cams are poor any way you measure them: get a proper
CCD cam and 2.4 GHz link like Black Widow AV's. And splurge on a good rx antenna.