View source for HP-19C/-29C

{{Redir|HP-19C|a series of similarly named calculators|HP-19B}}
{{Use dmy dates|date=April 2019|cs1-dates=y}}
[[Image:HP-19C.jpg|thumb|HP-19C calculator]]
[[File:HP29C.jpg|thumb|HP-29C with AC-powered battery charger]]

The '''HP-19C''' and '''HP-29C''' were scientific/engineering [[pocket calculator]]s made by [[Hewlett-Packard]] between 1977 and 1979. They were the most advanced and last models of the "20" family (compare [[HP-25]]) and included ''[[HP Continuous memory|Continuous Memory]]'' (battery-backed [[CMOS]] memory) as a standard feature.

The HP-19C included a small [[thermal printer]], one of the very few hand-held scientific calculators to offer such a feature (HP-91, HP-92 and [[HP-97]] were desktop units and later models like the [[HP-41C]] only supported external printers). Due to the printer's power requirements, the 19C used a battery pack of four [[AA battery|AA]]-sized [[Nickel-cadmium battery|NiCd]] cells, adding to the weight of the calculator and printer mechanism.

All other capabilities were the same in both models&nbsp;&ndash; [[Reverse Polish Notation|RPN]] expression logic, 98 program memory locations, statistical functions, and 30 registers.

Users could develop software for the HP-29C/19C, such as a [[prime number]] generator.<ref name="aslan198010">{{cite news | url=https://archive.org/stream/byte-magazine-1980-10/1980_10_BYTE_05-10_Software#page/n55/mode/2up | title=Prime Numbers on the HP-19C | work=BYTE | date=1980-10-01 | accessdate=2015-12-21 | author=Aslan, Wilfred | pages=54–58}}</ref> The calculators expanded the HP-25's program capabilities by adding subroutines, increment/decrement looping, relative branching and indirect addressing (via register 0 as index).

HP's internal code name for the 29C was ''[[Bonnie and Clyde|Bonnie]]'', the 19C was correspondingly named ''[[Bonnie and Clyde|Clyde]]''.{{citation needed|date=October 2013}}

The HP-19C and HP-29C were introduced at [[Suggested retail price|MSRPs]] of $345<ref>$345 in 1980 ≈ $910 in 2010 (see [http://oregonstate.edu/cla/polisci/faculty-research/sahr/sahr.htm Inflation Conversion Factors for Dollars] {{webarchive|url=https://web.archive.org/web/20071230220607/http://oregonstate.edu/cla/polisci/faculty-research/sahr/sahr.htm |date=2007-12-30 }})</ref> and $195,<ref>$195 in 1980 ≈ $510 in 2010 (ibid.)</ref> respectively.

{{anchor|29C GD}}A version adapted to support an additional backward-facing display manufactured by Educational Calculator Devices named EduCALC 29C&nbsp;GD existed as well.<ref>{{cite web |title=Educalc 29C GD - any information for me? |author-first=M. |author-last=Augustine |date=2014-04-25 |work=The Museum of HP Calculators |url=https://www.hpmuseum.org/forum/thread-1164.html |access-date=2022-07-01 |url-status=live |archive-url=https://web.archive.org/web/20210205021451/https://hpmuseum.org/forum/thread-1164.html |archive-date=2021-02-05}}</ref>

== Simulators and emulators==
* [http://www.hpmuseum.org/guest/miket/rpn29exe.zip HP-29C simulator] for Windows<!-- https://web.archive.org/web/*/http://www.hpmuseum.org/guest/miket/rpn29exe.zip -->
* [http://www.panamatik.de/html/hp_woodstock.html HP-19C and HP-29C emulators] for Windows<!-- https://web.archive.org/web/20160820224833/http://www.panamatik.de/html/hp_woodstock.html https://web.archive.org/web/*/http://www.panamatik.de/HP29Emulator.zip https://web.archive.org/web/*/http://www.panamatik.de/HP19Emulator.zip -->
* [https://github.com/mike632t/x11-calc HP Calculator emulators]  for Linux
*
[https://www.sydneysmith.com/wordpress/hp29u HP-29C microcode emulator] for any platform
*
[https://www.sydneysmith.com/wordpress/hp29w HP-29C microcode emulator] for Windows

== References ==
{{Reflist}}

== External links ==
*[http://www.hpmuseum.org/hp29.htm The Museum of HP Calculators' article on the HP-19C/29C]
**[http://www.hpmuseum.org/19cint.jpg Interior picture of 19C]
*http://www.hpmuseum.org/forum/thread-6398-post-73952.html#pid73952

{{HP calculators}}

{{DEFAULTSORT:HP-19C -29C}}
[[Category:HP calculators|19C]]