Other Unit-Related Applications

Sources of inspiration:

• An ancient article in Byte magazine: A Unit-Conversion Algorithm, by David L. Kahn in the March, 1985 issue, which I adapted on a Tandy 200 and then later turned into DimCalc.
• HP-28 and HP-48 series calculators from Hewlett-Packard. These calculators can track units throughout your calculations, but they are always abbreviated. If you don't know whehter "m" means meter or mile, you're hosed.
• Engineering Assistant for the Macintosh. In particular, the version I saw (years ago) presented useful physics and engineering equations with explanations of how to use them. But while they were pretty, they were only pictures of equations, and the software didn't allow you to manipulate them or plug in any values for the variables.

Macintosh applications:

• Convert by FifthWave
• various periodic-table applications
  • one in particular has a graphically-striking way to adjust a slider for any chosen attribute, and watch the various elements change color as your threshold moves above & below each element's value.

• iUnit from Black Cat Systems