EPS: Encapsulated Postscript, a computer file standard set by Adobe for printers, which is the mathematical definition of shapes, lines, color and space. This is one of the most accurate ways to define a font or image, but creates much larger file size. EPS files also add page description information to the files. Used on all computer, but not all postscript files are the same, nor readable between programs. EPSF is an IBM file generally, EPSP is usually found on Macintosh, and there are many different variations of each type.

Export: The act of sending a file out through a specialized mini-application, to print, compress, or to a specialized file format.

Exposure: The exposure setting in a camera is what regulates how much light is used to create the image. It doesn't matter whether it is a film camera or a digital camera. The exposure can be controlled in two ways; aperture adjustment and shutter speed adjustment

When you press the shutter release button of a digital camera, a metering cell measures the light coming through the lens and sets the aperture and shutter speed for the correct exposure. When the shutter opens briefly, each pixel on the image sensor records the brightness of the light that falls on it by accumulating an electrical charge. The more light that hits a pixel, the higher the charge it records. Pixels capturing light from highlights in the scene will have high charges. Those capturing light from shadows will have low charges. 

When the shutter closes to end the exposure, the charge from each pixel is measured and converted into a digital number. The series of numbers can then be used to reconstruct the image by setting the color and brightness of matching pixels on the screen or printed page.