Editing TK Solver (section)

==History==
Invented by [[Milos Konopasek]] in the late 1970s and initially developed in 1982 by [[Software Arts]], the company behind [[VisiCalc]],<ref name=TK1.NYT/> TK Solver was acquired by Universal Technical Systems in 1984 after Software Arts fell into financial difficulty and was sold to [[Lotus Software]].<ref name=TK2.NYT>{{cite news |newspaper=[[The New York Times]]
   |url=https://www.nytimes.com/1985/04/09/business/lotus-set-to-acquire-software-arts.html
   |title=Lotus Set to Acquire Software Arts
   |author=David E. Sanger  |date=April 9, 1985}}</ref> Konopasek's goal in inventing the TK Solver concept was to create a problem solving environment in which a given mathematical model built to solve a specific problem could be used to solve related problems (with a redistribution of input and output variables) with minimal or no additional programming required: once a user enters an equation, TK Solver can evaluate that equation as is&mdash;without isolating unknown variables on one side of the equals sign.

Software Arts also released a series of "''Solverpacks''" - "ready-made versions of some of the formulas most commonly used in specific areas of application."<ref name=SolvPacks.NYT>{{cite news |newspaper=[[The New York Times]]
   |url=https://www.nytimes.com/1983/08/09/science/personal-computers-ready-to-use-formulas-for-finance-to-physics.html
   |title=Ready-to-use formulas for finance to physics
   |author=Erik Sandberg-Diment  |date=August 9, 1983}}</ref>

''The New York Times'' described TK Solver as doing "for science and engineering what word processing did for corporate communictions [sic] and calc packages did for finance."<ref name=TK1.NYT/>

===Universal Technical Systems===
Lotus, which had acquired Software Arts, including TK Solver, in 1984<ref name=TK2.NYT/> sold its ownership of the software to Universal Technical Systems less than two years later.<ref name=BriefsUTS.NYT/> Release 5 was still considered "one of the longest–standing mathematical equation solvers on the market today" in 2012.<ref name=Springs2012>{{cite magazine  |magazine=Springs
   |url=https://issuu.com/springmanufacturersinstitute/docs/29193_150
   |date=Summer 2012  |publisher=Spring Manufacturers Institute
   |title=TK Solver R5}}</ref><ref name=UTS5/>