What does QIX stand for? 

Qix

Qix is a 1981 puzzle developed by husband and wife team Randy and Sandy Pfeiffer and published in arcades by Taito America. Qix is one of a handful of games made by Taito's American division. At the start of each level, the playing field is a large, empty rectangle, containing the "Qix"–a stick-like entity that performs graceful but unpredictable motions within the confines of the rectangle. The objective is to draw lines that close off parts of the rectangle to fill-in supermajority of the playfield. Qix was ported to the contemporary Atari 5200 (1982), Atari 8-bit family (1983), and Commodore 64 (1983), then was brought to a wide variety of systems in the late 1980s and early 1990s: MS-DOS (1989), Amiga (1989), another version for the C64 (1989), Apple IIGS (1990), Game Boy (1990), Nintendo Entertainment System (1991), and Atari Lynx (1991).

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