Pong, the Atari creation that launched the computer game craze, came with these instructions: "Avoid missing ball for high score."
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| Number | Title | Issue Date |
| 5060554 | Optical sighting system for a gun mounted on mobile platform A sighting system for arming a gun mounted on a self-propelled platform. The system comprising a periscope with a collimator having a source of monochromatic light and a swivelling mirror, and in association therewith an auxiliary sighting system so devis... | 10/29/1991 |