Frames Per Second (FPS)
This term relates to video or 3D games, and is the amount of single full screen (or full window) pictures (or frames) that are displayed each second to generate what appears to be a moving image. Typical digital video displays at around 30 FPS. Higher frame rates are not really necessary, as the human eye cannot typically handle more than about 30 FPS. Some games will average 30 FPS or higher and look choppy. Usually this is due to intense scenes that cause the action to dip below 30 FPS for short periods of time. Rates of over 100 FPS in games are common nowadays with less complex 3D action games, but do not necessarily add to the experience of playing a game.
First Person Shooter (FPS)
This describes a video game that is played from the first person perspective, i.e., looking out of the eyes of the main character. As well, to achieve the “shooter” aspect, the main character usually has some type of weapon, and to achieve your goals you must kill off enemies. The first meaningful game of this genre was Castle Wolfenstein 3D, and other popular examples include the Doom, Quake, and Unreal series.