- A reticle, or reticule also known as a graticule, is a pattern of fine lines or markings built into the eyepiece of an optical device such as a telescopic sight, spotting scope, theodolite, optical microscope or the screen of an oscilloscope, to provide measurement references during visual inspections. Today, engraved lines or embedded fibers may be replaced by a digital image superimposed on a screen or eyepiece. Both terms may be used to describe any set of patterns used for aiding visual measurements and calibrations, but in modern use reticle is most commonly used for weapon sights, while graticule is more widely used for non-weapon measuring instruments such as oscilloscope display, astronomic telescopes, microscopes and slides, surveying instruments and other similar devices.
- Pac-Man (Atari 2600 video game) (Wikipedia)
Pac-Man is a 1982 maze video game developed and published by Atari, Inc. under official license by Namco, and an adaptation of the 1980 hit arcade game of the same name. The player controls the title character, who attempts to consume all of the wafers in a maze while avoiding four ghosts that pursue him. Eating flashing wafers at the corners of the screen causes the ghosts to temporarily turn blue and flee, allowing Pac-Man to eat them for bonus points. Once eaten, a ghost is reduced to a pair of eyes, which return to the center of the maze to be restored.