The reverse Polish scheme was proposed in 1954 by Arthur Burks, Don Info elektronika pdf, and Jesse Wright and was independently reinvented by Friedrich L. During the 1970s and 1980s, Hewlett-Packard used RPN in all of their desktop and hand-held calculators, and continued to use it in some into the 2010’s. Most of what follows is about binary operators.
An example of a unary operator whose standard notation may be interpreted as reverse Polish notation is the factorial, “n! Polish notation: 4 is first subtracted from 3, then 5 is added to it. An advantage of reverse Polish notation is that it removes the need for parentheses that are required by infix notation. In comparison testing of reverse Polish notation with algebraic notation, reverse Polish has been found to lead to faster calculations, for two reasons. Because reverse Polish calculators do not need expressions to be parenthesized, fewer operations need to be entered to perform typical calculations. Additionally, users of reverse Polish calculators made fewer mistakes than for other types of calculator. There are other ways of producing postfix expressions from infix expressions.
1963, and the American Burroughs B5000, announced in 1961 and also delivered in 1963. Later LCD-based calculators in the early 1980s such as the HP-10C, HP-11C, HP-15C, HP-16C, and the financial calculator, the HP-12C also used reverse Polish notation. Around 1987, HP introduced RPL, an object-oriented successor to reverse Polish notation. HP 30b hardware platform, support Hewlett-Packard-style classical reverse Polish notation with either a four- or an eight-level stack. In Britain, Clive Sinclair’s Sinclair Scientific and Scientific Programmable models used reverse Polish notation. Prinz and Prinztronic were own-brand trade names of the British Dixons photographic and electronic goods stores retail chain, which was later rebranded as Currys Digital stores, and became part of DSG International.