Aquarium    The space between the engine compartment and the firewall
            (a false bulkhead is at the back of the engine compartment)

AMM         Air Mass Meter (aka MAF sensor - Mass Air Flow)
APC         Automatic Power Control (turbo boost control)
DI          Direct Ignition
DIY         Do It Yourself
ECU         Electronic Control Unit (computer)
EDU         Electronic Display Unit (trip computer)
EZK         I dunno; someone help me out here
FI          Fuel Injection
MAP         Manifold Absolute Pressure (transducer)
OG9K        Older Generation 9000
TLA         Three Letter Acronym
TCS         Traction Control System

Link to a SERIOUS TLA list       THANKS to Luc Tintillier