File Extension Descriptions:
.ai
Adobe Illustrator (vector file, that may also contain raster images)
.eps
Encapsulated PostScript (often a vector file but may also contain raster images)
.jpg or .jpeg
Joint Photographic Experts Group (raster file)
.pdf
Portable Document Format File (page layout file that can contain vector or raster images)
.psd
Adobe Photoshop file (raster file, with the ability to contain smart objects and text)
.zip
Compressed file
Graphic Design Terms
Bleeds
The graphic area extending past the final trim size.
CMYK
Cyan, Magenta, Yellow & Black. The 4 color process used in digital printing.
Compression
Using various methods to reduce the file size. Often used to group several files together for ease and protection in uploading and downloading.
DPI
Dots per Inch. Also referred to as PPI (pixels per inch). This is the resolution of a raster image.
Package
A process in Adobe Illustrator which groups all used files (fonts,links, and Illustrator file) into a single folder for output.
Rasterized (raster)
These files have a set number of pixels and can not be increased without a reduction in image quality
RGB
Red, Green & Blue. The 3 color process used by monitors to display color.
Vector
Vector files are created by Adobe Illustrator. They use a mathematical dimensions to create shapes that may be scaled to any size without any change in image quality. They do not have a set number of pixels unless you convert them to a raster file.
