for ushering in the golden age) was gaining considerable popularity in the United States, and the year that saw vector display technology, first seen in arcades in 1977 with Space Wars, rise to prominence via Atari's Asteroids. However, 1983 was the period that began "a fairly steady decline" in the coin-operated video game business and when many arcades started disappearing. Walter Day of Twin Galaxies places this period's beginning in the late 1970s, when color arcade games became more prevalent and arcade video games started appearing outside of their traditional bowling alley and bar locales, through to its ending in the mid-1980s. RePlay magazine in 1985 dated the arcade industry's "video boom" years from 1979 to 1982. The golden age of arcade games largely coincided with, and partly fueled, the second generation of game consoles and the microcomputer revolution. In contrast to most other sources, the History of Computing Project website places the golden age of video games between 1971 and 1983, covering the "mainstream appearance of video games as a consumer market" and "the rise of dedicated hardware systems and the origin of multi-game cartridge based systems". 1971 was chosen as an earlier start date by the project for two reasons: the creator of Pong filed a pivotal patent regarding video game technology, and it was the release of the first arcade video game machine, Computer Space. Business The golden age was a time of great technical and design creativity in arcade games. The era saw the rapid spread of video arcades across North America, Europe, and Asia. The number of video game arcades in North America was doubled between 1980 and 1982; reaching a peak of 10,000 video game arcades across the region (compared to 4,000 as of 1998). Beginning with Space Invaders, video arcade games also started to appear in supermarkets, restaurants, liquor stores, gas stations and many other retail establishments looking for extra income. Video game arcades at the time became as common as convenience stores, while arcade games like Pac-Man and Space Invaders appeared in most locations across the United States, including even funeral homes. The sales of arcade video game machines increased significantly during this period, from $50 million in 1978 to $900 million in 1981, with 500,000 arcade machines sold in the United States at prices ranging as high as $3000 in 1982 alone. By 1982, there were 24,000 full arcades, 400,000 arcade