JPEG - Wikipedia, the free encyclopedia

JPEG compression is used in a number of image file formats. JPEG Exif is the most common image format used by digital cameras and other photographic ...

http://en.wikipedia.org/wiki/JPEG

RAW vs. JPEG - Digital Photography School

This beast of a camera can produce files in a Raw format, whatever that means, but it also has the nice comfortable JPEG format that we all know and love.

http://digital-photography-school.com/raw-vs-jpeg