> Thus, the first 12 HP-35 portable calculators were made as a "hack" by and for other engineers at HP. It is rumored that the development engineer got carried

> Thus, the first 12 HP-35 portable calculators were made as a "hack" by and for other engineers at HP. It is rumored that the development engineer got carried away and implemented a full suite of scientific functions to satisfy requests from his co-workers. When these prototypes proved popular, HP decided to turn the HP-35 into a commercial product. The HP-35 was the first calculator with a full suite of trigonometric and transcendental functions. This appears to be a summery based on the link above (http://codex99.com/design/the-hp35.html http://codex99.com/design/the-hp35.html) but I think it's misinterpreted. The original states > Eventually Hewlett, despite the SRI report, decided he wanted one and thought his engineers should have one as well. On February 2nd, 1971—Groundhog Day—he gave the official go-ahead. The fact that he had a personal desire does not imply that it was "a hack" or anything less that a full commercial product from the start and there's no evidence to the contrary.