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Using [[Lisp (programming_language)|Lisp]] as the programming basis, [[Carl Engelman]] created [[MATHLAB]] in 1964 at [[MITRE]] within an artificial-intelligence research environment. Later MATHLAB was made available to users on PDP-6 and PDP-10 systems running TOPS-10 or TENEX in universities. Today it can still be used on [[SIMH]] emulations of the PDP-10. MATHLAB ("'''math'''ematical '''lab'''oratory") should not be confused with [[MATLAB]] ("'''mat'''rix '''lab'''oratory"), which is a system for numerical computation built 15 years later at the [[University of New Mexico]].
In 1987, [[Hewlett-Packard]] introduced the first hand-held calculator CAS with the [[HP-28 series]], and it was possible, for the first time in a calculator,<ref name="Nelson">{{cite web | title=Hewlett-Packard Calculator Firsts | first=Richard | last=Nelson | publisher=Hewlett-Packard | url=http://h20331.www2.hp.com/Hpsub/cache/392617-0-0-225-121.html | archive-url=https://web.archive.org/web/20100703031935/http://h20331.www2.hp.com/Hpsub/cache/392617-0-0-225-121.html | archive-date=2010-07-03}}</ref> to arrange algebraic expressions, differentiation, limited symbolic integration, [[Taylor series]] construction and a ''solver'' for algebraic equations. In 1999, the independently developed CAS [[Erable]] for the [[HP 48 series]] became an officially integrated part of the firmware of the emerging [[HP 49/50 series]], and a year later into the [[HP 40 series]] as well, whereas the [[HP Prime]] adopted the [[Xcas]] system in 2013.
The [[Texas Instruments]] company in 1995 released the [[TI-92]] calculator with a CAS based on the software [[Derive computer algebra system|Derive]]; the [[TI-Nspire series]] replaced Derive in 2007. The [[TI-89 series]], first released in 1998, also contains a CAS.
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