While the commercial sector of the video game industry was focused on the growing home video game console market in the late 1970s to early 1980s, a number of games for personal computers were released by one- or two-man teams, self-distributed in stores or sold through mail order. This was particularly true in the United Kingdom, where video game consoles had not gained as much traction as in the United States. There, the early microcomputers such as the ZX Spectrum were popular, launching a range of "bedroom coders" which initiated the UK's video game industry. By 1984, the United Kingdom's game industry had become crowded with many professional development teams making games at a large pace. Game developer Chris Crawford warned potential small developers away from the commercial prospects of the field in late 1984: