- Babbage Difference Engine
- Features computational tools including free downloadable extended precision. Includes examples of formulas for trig and log values.
- DOS Beowulf
- Highlights a project for the experimenter, amateur scientist, small laboratories, and the inventor. With features and downloads.
- UBASIC
- Shows information on number theoretic investigations. Also contains downloads and other Internet resources.
- UBASIC Programs
- Highlights integer arithmetic and has additional built-in functions suitable for investigations relating to properties of integers.
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