HTML: Hypertext Markup Language

DHTML: Dynamic Hypertext Markup Language

XHTML: Extendable Hypertext Markup Language

CSS: Cascading Style Sheets

Hexcodes:
A combination of six numbers and/or letters that stand for a color. (ex: #DC143C)

Javascript:
Another form of scripting language (not HTML) that creates mostly interactive application processes. (ex: cookies, forms, popup boxes, drop-down menus, etc.)

Cookies:
A way of storing and retrieving information on your computer using Javascript coding.

Metafile:
A file that contains information about another file.

Pixel (Picture Element):
A single, very tiny point in a graphic.

Resolution:
The number of pixels shown on your desktop moniter. (ex: 640x480, 800x600, 1024x768, etc. So if you had 800x600, your screen would show 800 pixels on 600 lines.)

GIFs (Graphics Interchange Format):
An animated image file; a series of noninteractive looped images save in only one image file, and are limited to 256 colors. Also, GIFs are not always animated.

JPG/JPEG (Joint Photographic Experts Group):
Compressed images that can still be high in quality and are quick-loading compared to other image types, though the more the image is compressed the less quality it will have.

BMP (Bitmap):
Default image type for Windows 95+, can be saved in millions of colors but have a long loading time.

Flash:
Interactive animations that can use much more colors than GIFs can, and are quick-loading.