design was first shown at the Midwest Area Computer Club conference in June 1976. The machine was not ready for sales at this point, but they did a brisk business selling their existing expansion card line. This was followed by the Personal Computing '76 (PC'76) show in late August in the dilapidated Shelburne Hotel in Atlantic City. The order book was officially opened and Sol was a huge hit at this show. Soon after, Marsh was invited to demonstrate the Sol on NBC's The Tomorrow Show. They used a game by Steve Dompier called "Target" to show off the system's capabilities. The show's host, Tom Snyder, ended up playing the game right through the commercial breaks, and they had to force him to give up the machine in order to finish the show. Sales The Sol was initially offered in three versions. The base motherboard was offered as the Sol-PC, available as a kit for , or fully assembled and tested for . The Sol-10 added a case, keyboard and power supply, was in kit form and assembled. Finally the Sol-20 added a keyboard with numeric keypad, and a larger power supply to feed the five expansion slots and a fan to cool them, for as a kit or assembled. Advertising of the time referred to the Sol-20 as "The first complete small computer under ". Most systems would require additional pieces, which they bundled as the "Sol Systems"; the Sol System I consisted of a Sol-20, an 8k RAM card, a PT-872 monitor and the RQ-413 Cassette Recorder, for . In keeping with the hacker ethic, the company also offered to send out copies of the schematic for the motherboard for the cost of postage, later estimating that somewhere between 40,000 and 50,000 copies were sent. Few, if any, Sol-10s were sold, and the company focused on the Sol-20. The first machines shipped in December 1976. These were also available for third-party sales, and this began the formation of a dealer network among some of the earliest computer stores. By 1977, Processor Technology had a reputation for quality and was among the best-selling computers in the world. By this time, S-100 machines were beginning to make inroads into business markets. Processor Technology invited all of their dealers to a meeting in Emeryville, California, outside Berkeley, to introduce their Helios floppy disk drive for , along with their PTDOS system