Used Car Definitions

I am buying a used car and I can't figure out some of the short form codes for the options like the HT CT and EW. What are they and where can I find the comprehensive list of definitions.

Some of the bigger newspapers or autotrader type magazines have a small section with those abbr.'s spelled out.

HT usually stands for Heated but is usually followed by Back glass or outside mirrors.

CT ??? no clue here

EW my best guess is Electric Windows. Usually they will say PDL and PW though.

Good luck with it.

HT could stand for hard top as opposed to convertible.
CT - thats a new one.

Here are a couple more
efi - electonic fuel injection
ps - power steeing- maybe power seats
pb - power brakes