- The whole Calc has been written by Dave Gillespie ,
`daveg@synaptics.com`, who most recently has been seen at ``Synaptics, The Human Interface Company''. They make touchpads, quickstrokes (for Chinese character input), etc. In the past he's been seen at Caltech, where he wrote- 1.
- p2c: Pascal to C translator.
- 2.
- Calc: the GNU Emacs calculator, last version is 2.02f, dated 15th of December 1996.
- 3.
- Chipmunk CAD Tools: jointly with John Lazzaro, in particular Log, a digital and analog circuit simulator.
- 4.
- A hypertext system for the HP 9836C.
- 5.
- View: a data manipulation and plotting tool.

- Calc is written entirely in Emacs Lisp and is integrated with Emacs.
- It is based on the HP-28/48 calculators.
- It provides a choice of a stack-based entry (reverse Polish) or of a normal algebraic notation.
- Arbitrary precision floating point and integer calculations are supported.
- All the usual and many unusual mathematical functions, including, of course, logs and trigonometric functions.
- Bitwise operations, non-decimal numbers: useful for programmers.
- Financial functions: future value, internal rate of return.
- Elements of number theory: prime factorization,
and modulo
*N*arithmetics for any*N*. - Algebraic manipulations including polynomials, calculus, solving equations, numerics, curve fitting, summations, logical operations, and writing your own new rewrite-rules.
- Movements of data between Emacs buffers.
*Embedded Mode*for manipulating Calc formulas and data inside any other Emacs buffer.- Gnuplot based graphics.
- Programming using keyboard macros, algebraic formulas, algebraic rewrite rules, and extended Emacs Lisp.