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{{More citations needed|date=November 2020}}{{History of computing}}
'''The history of Polish [[computing]] ([[informatics]])''' began during the Second World War with breaking the [[Enigma machine]] code by Polish mathematicians. After World War II, work on Polish computers began. Poles made a significant contribution to both the theory and technique of world computing.

In the State Institute of Mathematics, established in 1948 (from 1952 at the Polish Academy of Sciences), it was decided{{when|date=August 2022}} to start prospective work on the construction of at least one machine comparable to the American ENIAC. For this purpose, the Mathematical Apparatus Group of this Institute (''pol. Grupa Aparatów Matematycznych, GAM'') was established.{{when|date=August 2022}} The first engineering employee of GAM was {{ill|Leon Łukaszewicz|pl}}, and shortly after he was joined by his fellow students, [[Romuald Marczyński]] and [[Krystyn Bochenek]]. Logician and statistician [[Henryk Greniewski]] became the head of GAM. There were no resources to build such a computer - neither technical facilities, nor electronic equipment, nor experience. The only chance was given by the enthusiasm and alleged talent of a few newly promoted engineers.{{cn|date=August 2022}}

==Polish computer hardware designs in 1958-1986==
[[File:Polski komputer XYZ.jpg|thumb|[[XYZ (computer)|XYZ]], a Polish computer developed in 1958.]]
===Odra===
Some of the earliest computers created in Poland were the first [[Odra (computer)|Odra computers]]. They were manufactured at the [[Elwro]] manufacturing plant in [[Wrocław]], (the brand name comes from the [[Odra (Poland)|Odra River]] that flows through the city of Wrocław) and exported to other communist countries. The production started in 1959–1960. The last series of Odra computers—the Odra 1300—consisted of three models: the Odra 1304, 1305, and the 1325. The hardware was developed by Polish teams to run the software for the above machines provided by the British company [[International Computers Limited|ICL]]. The Odra 1300 models were designed to be [[ICT 1900 series|ICL 1900]] compatible.

===K-202===
[[K-202]] was 16-bit minicomputer built by [[Jacek Karpiński]] in 1971. It was faster and cheaper than most of the world's production at this time{{Citation needed|date=February 2019}}, and more advanced than IBM PC released decade later{{Citation needed|date=February 2019}}, but the mass production was never started because of political reasons and dependence on western parts; it was not compatible with the [[ES EVM]] standard.

===Meritum===
Produced by Mera-Elzab, [[Mera-Elzab Meritum|Meritum I and II]] models were created in 1983 and 1985 respectively. Based on U880DA CPU (Zilog Z80 clone), with 16 and 48KB RAM, were based on the [[TRS-80]] computer. They were intended primarily for scientific, engineering and office applications.

===Elwro Junior===
Elwro 800 Junior (1986) and Elwro 804 Junior PC (1990) were [[ZX Spectrum]] clones intended for schools, and for home use respectively. The 804 model had a 3.5" disk drive built in; the drive was available as an accessory for 800 (the alternative mass storage being a tape recorder). The computers used the Z80A CPU, 64KB RAM and 24KB ROM. The ROM contained either CP/J (a variant of [[CP/M]]) operating system, or Spectrum-compatible BASIC. <ref>[http://www.starekompy.pl/800.html  Elwro 800 Junior PC on Starekompy.pl]</ref><ref>[http://www.starekompy.pl/804.html Elwro 804 Junior PC on Starekompy.pl]</ref>

===Mazovia===
Mazovia was a Polish clone of [[IBM PC/XT]].

==Polish computer scientists==
* [[Grzegorz Rozenberg]] - researcher in fields of [[natural computing]], formal language and [[automata theory]], graph transformations, and concurrent systems. He is referred to as the guru of natural computing.
* [[Janusz Brzozowski (computer scientist)|Janusz Brzozowski]] - known for his contributions to mathematical logic, circuit theory, and automata theory, focused on [[regular expression]]s and on syntactic semigroups of formal languages.
* [[Andrew Targowski]] - contributed to the areas of [[enterprise computing]], societal computing, information technology impact upon civilization, [[information theory]], wisdom theory, and civilization theory.
* [[Jacek Karpiński]] - main creator of [[K-202]], contributed to areas of [[computational learning theory|machine learning algorithms]], techniques for character and [[image recognition]].
* [[Jan Węglarz]] - one of creators of [[Elwro 800 Junior]], currently specializing in operations research.
* [[Zenon Kulpa]] - known for his work on diagrammatic representation and [[diagrammatic reasoning]].
[[File:Maszyna_Pawlaka_.svg|thumb|[[Pawlak Machine]], a [[model of computation]] invented by [[Zdzisław Pawlak]].]]

==The largest Polish IT companies==
*[[CD Projekt Red]] - is a video game developer, publisher and distributor based in Warsaw.
*[[Goodram]] - the largest Polish manufacturer of RAM, flash drive and SD cards.

==Polish Information Processing Society==
The ''[[Polish Information Processing Society]]'' (also known as ''Polish [[Informatics]] Society'') is the oldest Polish organization that associates professionals from the [[computing]] industry. They act for their environment, as well as the social and economic environment. As part of its statutory activities, the Polish Informatics Society speaks on behalf of the surrounding community in the most important issues related to computerization, is consulted in legislative processes, and conducts certification and appraisal activities. They also organize a series of conferences, meetings and thematic workshops aimed at improving competences and integrating IT specialists. They are also working to increase general digital skills in society. They effectively promote Poland by showing the global successes of their computer scientists and unique digital technology products created in Poland.

==See also==
* [[History of computer hardware in Yugoslavia]]
* [[Computer systems in the Soviet Union]]
* [[History of computing in Romania]]
* [[History of computer hardware in Bulgaria]]

==References==
{{reflist}}

==External links==
* [https://www.youtube.com/watch?v=v_YSfUDjU6s] - Main Movie by Polish Information Processing Society for 70th anniversary of Polish informatics (2019)
* [https://www.youtube.com/watch?v=f2WwsoPQ4bI] - Polish school of algorithmics and programming, a video by Polish Information Processing Society (2019)

[[Category:Science and technology in Poland]]
[[Category:History of computing|Poland]]