Calculator watch financial functions (in the Casio CBA-10). Usually calculator watch operates with eight digits number, however, calculator watch can operate with 6 digits (for example, Casio C-801) or 10 digits (Casio CBA-10) numbers. Calculator watches first appeared in the mid 1970s introduced by Pulsar (1975, then a brand of the Hamilton Watch Company) and Hewlett Packard. Several watch manufacturers have made calculator watches over the years, such as Pulsar and Timex, but the Japanese electronics company Casio produced the largest variety of models. In the mid-1980s, Casio created the Databank calculator watch, which not only performed calculator functions, but also stored
Skyles Electric Works Skyles Electric Works Skyles Electric Works was founded in California by Bob Skyles, a former Commodore engineer, to produce hardware add-ons for the Commodore PET. Like Apple Computer it began in a garage in Cupertino, but for most of the company's existence it was based in Mountain View. The first products from Skyles Electric Works were memory expansions and keyboards (the first PETs had calculator-style keys which were unsuited to touch-typing). The earliest software products were firmware, including the "Command-O" and "Disk-O-Pro", which enhanced the BASIC language of the PET. However the company also published cassette and disk-based software including