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==References==
{{reflist|refs=
<ref name="Ball_1978">{{cite book |title=Algorithms for RPN calculators |url=https://archive.org/details/algorithmsforrpn0000ball |urlauthor-access=registration |first=John A. |author-last=Ball |date=1978 |edition=1 |publisher=[[Wiley-Interscience]], [[John Wiley & Sons, Inc.]] |___location=Cambridge, Massachusetts, USA |isbn=0-471-03070-8 |url=https://archive.org/details/algorithmsforrpn0000ball |url-access=registration |access-date=2023-09-21}}</ref>
<ref name="TI EOS vs AOS">{{cite web |url=https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/12705 |title=Differences Between Algebraic Operating System (AOS) and Equation Operating System (EOS) |publisher=[[Texas Instruments]] |date= |url=https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/12705 |access-date=2022-11-29 |url-status= |archive-url= |archive-date=}}</ref>
<ref name="Thimbleby_1998">{{cite web |title=A new calculator and why it is necessary |author-first=Harold W. |author-last=Thimbleby |author-link=Harold W. Thimbleby |publisher=Computing Science, Middlesex University |___location=London, UK |date=September 1998 |url=http://www.uclic.ucl.ac.uk/harold/srf/allcalcs.pdf |title=A new calculator and why it is necessary |publisher=Computing Science, Middlesex University, London, UK |date=September 1998 |access-date=2009-05-04 |url-status=dead |archive-url=https://web.archive.org/web/20070207044654/http://www.uclic.ucl.ac.uk/harold/srf/allcalcs.pdf |archive-date=2007-02-07}}</ref>
<ref name="Holmes_2003">{{cite web |title=Truth and Clarity in Arithmetic |author-first=Neville |author-last=Holmes. [|date=2003 |publisher=University of Tasmania |url=http://standards.computer.org/sabminutes/2003Wint/Truth%20and%20Clarity%20in%20Arithmetic%20-%20Neville%20Holmes.pdf Truth|access-date=2023-09-21 and|url-status=live Clarity in Arithmetic] {{Webarchive|archive-url=https://web.archive.org/web/20061007234721/http://standards.computer.org/sabminutes/2003Wint/Truth%20and%20Clarity%20in%20Arithmetic%20-%20Neville%20Holmes.pdf |archive-date=2006-10-07}}, University of Tasmania; 2003.</ref>
<ref name="PhysOrg_2005">{{cite web |title=Professor devises easier calculator |website=www.physorg.com |date=2005-06-27 |publisher=[[United Press International]] |url=http://www.physorg.com/news4773.html |access-date=2023-09-20 |url-status=live |title=Professor devises easier calculator |website=www.physorg.com |date=2005-06-27 |archive-url=https://web.archive.org/web/20230115103904/https://phys.org/news/2005-06-professor-easier.html |archive-date=2023-01-15}}</ref>
<ref name="Furman_2006">{{cite web |title=Declarative Programming – Strategies for Solving Software Problems |author-first=Roy E. |author-last=Furman |titledate=DeclarativeJuly Programming – Strategies for Solving Software Problems2006 |url=http://www.articlesalley.com/article.detail.php/7013/178/Education/Internet/36/Declarative_Programming_-_Strategies_for_Solving_Software_Problems |date=July 2006 |access-date=2009-05-04 |url-status=dead |archive-url=https://archive.today/20120723100846/http://www.articlesalley.com/article.detail.php/7013/178/Education/Internet/36/Declarative_Programming_-_Strategies_for_Solving_Software_Problems |archive-date=2012-07-23}}</ref>
<ref name="Watt_1990">David{{cite A. Watt.web |title=Programming language concepts and paradigms, |author-first=David A. |author-last=Watt |publisher=[[Prentice Hall;]] |date=1990. Citation 13 at |url=http://citeseer.ist.psu.edu/context/14802/0.}}</ref>
<ref name="Matsushita_1998">Tatsuru{{cite Matsushita.web |title=Expressive Power of Declarative Programming Languages, |author-first=Tatsuru |author-last=Matsushita |type=PhD thesis, |publisher=Department of Computer Science, University of York; |date=October 1998. Citation 13 at |url=http://citeseer.ist.psu.edu/context/14802/0.}}</ref>
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