Arbitrary precision arithmetic system and calculator
Calc is an arbitrary precision C-like arithmetic system that is a calculator, an algorithm-prototyper, and a mathematical research tool. Calc comes with a rich set of built-in mathematical and programmatic functions. Note: this copy of Calc is linked against the GNU Readline library and has been converted to the ordinary GPL as per section 3 of the LGPL. See the included calc-converted-to-gpl.txt document for details.