Adobe Acrobat Reader 1.0 for DOS

Acrobat Reader is the free software from Adobe used to read, view, and print documents created by the commercial Adobe Acrobat product. Its primary strength is that documents appear and print identically across differing systems. Acrobat Reader 1.0 for DOS is a 32-bit DOS4GW extended MS-DOS application. It has a built-in GUI that mimics the Windows 3.1 user interface. It supports VGA and VESA graphics modes up to 1024x768x256. This is the only version released for DOS.
1.0 also had Macintosh and Windows versions.

Ability Plus 3.0

This page is for anyone curious about the Ability DOS program of the 80s and 90s. The link below is a full working version of the final release of Ability. There is no support offered on this download.
There's some information on Wikipedia about the history of the product. download >>

Eureka: the Solver

A product from Roger Schlafly. Eureka was an equation solving and graphics product from Borland in the late 1980s. It ran under DOS and on the Mac. Eureka was listed among the InfoWorld Magazine top 100 hardware and software computer products of 1987.
Roger created Eureka, and when Borland abandoned it, and put out a shareware version under the name Mercury. You can find version 2.09 from Univ. of Tennessee, Simtel, or other DOS shareware repositaries.
Hardly anyone pays for Eureka or Mercury anymore, thats why author released a freeware version of Eureka. It is free for personal or educational use. Some commercial use is also free - contact with him for permission.
The program is rather dated, but it still has some useful features. For example, it can give exact solutions to numerical problems. In certain cases, it will give provably all solutions and show only those digits that have been proved to be correct.
You can contact Roger Schlafly at roger@darkbuzz.com download >>