BAT-10 is a menu-driven program that performs a lot of interesting mathematical functions. BAT-10 was written in the early 1990's, so any practical utility it may have once had is long since superceded by newer software. BAT-10's real strength lies not in its breadth of functionality, but rather in its prose. Each option in the program has a humorous introductory paragraph which you just have to read to appreciate. (Random trivia: BAT-10 was named in homage to my high school geometry teacher, Mrs. Batten.)
A couple of caveats, in case you ever mistakenly decide to use BAT-10 for serious work:
BAT-10 was written in Microsoft QBasic, which was distributed with MS-DOS 5.0 - where I was introduced to it. It was and is a fine language for writing text-based programs; alas the version that came with MS-DOS 5.0 did not include a compiler. What that means is that I could distribute the program as source code only, and hope that people had QBasic installed on their computers.
The following decade changed the playing field somewhat. With the advent of Windows, Microsoft no longer distributed QBasic with their operating systems, and QBasic became essentially an unsupported product. However, QBasic retained a loyal following on the Internet. While surfing the web one day, I came across a site devoted to QBasic (and its sister product QuickBasic). At this site, I found an old QBasic compiler which I eagerly downloaded.
Thanks to this compiler, I was finally able to make a self- contained EXE version of BAT-10. So, it is with great pleasure that I now present BAT-10 on the Internet for all to enjoy (or despise, or ignore completely). Naturally, I'm including the source code in case anyone wants to use it in their own projects. Reminder: I wrote this a long time ago, so I make no guarantees with respect to its quality or readability!
To learn more about QBasic, as well as download compilers and sample programs, visit:
Enjoy!