Bit depth / Color Depth: Amount of colour stored in a graphic
Web Ascii: Special Chars on the web?
Lossless: Gif, image compression losses no data/quality
Lossy: Jpg, image compression sacrifices quality
Dither: Organized method of dispersing limited colours across a compressed image
Handler: OnClick, OnMouseOver / to handle: action, one that handles: completes the action of handling.