> CCS is really one nice product. It has many displays, financial and
> statistical functions, programmability, and many more options. One
> special feature is the scripts you can write. They emulate HP 41CX's
> syntax, so you have thousands of solutions open to you. About the
> only thing I could wish for would be that, once I have created my
> custom, dream calculator, I could save a hardware version of it so
> that I could get rid of my wimp pocket calculator.
>
> ? David E. Smith, [MacTutor][1]

Like another Dubl-Click product, [World Class Fonts][2], Calculator
Construction Set seems to be named after [a Steve Jobs anecdote][3].

Download #1: Calculator Construction Set version 2.04
Download #2: Calculator Construction Set version 1.04

Download Manual: Calculator Construction Set v2.0 User's Guide (PDF
with thanks to long123short for this Guide).

Compatibility
Architecture: 68k

  [1]: http://www.mactech.com/articles/mactech/Vol.05/05.11/Nov89Letters/index.html
  [2]: http://macintoshgarden.org/apps/world-class-fonts
  [3]: https://www.folklore.org/Calculator_Construction_Set.html