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ChiWriter is a WYSIWYG scientific text editor for DOS. Created by Cay Horstmann in 1986, it was one of the first that could write mathematical formulas on common PC computers.

Derive was a computer algebra and graphing system, developed as a successor to muMATH by Soft Warehouse, Inc. in Honolulu, Hawaii, now owned by Texas Instruments. Derive was implemented in muLISP, also by Soft Warehouse. The first release was in 1988 for DOS. It was discontinued on June 29, 2007 in favor of the TI-Nspire CAS. The last and final version is Derive 6.1 for Windows.

Eureka is a friendly and well-polished equation solver and plotter
published by Borland. The software was targeted at both business
people and scientists. Not only does it include scientific function,
it also includes financial functions. It was notable for having a
friendly windowing and menuing interface that let users do multiple
things at a time. It competed directly with *Mathcard*.

Mathcad is computer software primarily intended for the verification, validation, documentation and re-use of engineering calculations.

MatLab is a high speed, interactive programming utility for manipulating, calculating, and plotting complicated mathematical equations. It is considered easy to use for those familiar with typical algebra equations.