ISBN: | 978-5-5107-2327-4 |
High Quality Content by WIKIPEDIA articles! The HP-35 was Hewlett-Packard`s first pocket calculator and the world`s first scientific pocket calculator (a calculator with trigonometric and exponential functions). Like some of HP`s desktop calculators it used reverse Polish notation. Introduced at US$395, the HP-35 was available from 1972 to 1975.