XZCalc is a calculator program with the following features can calculate with quaternions, complex matrices and scalars; Extra precision to millions of decimal places; Uses Fast Hartley Transform to speed-up long multiplies; Separate input and output notation, base 2 to base 36; Efficient Transcendental functions; Hyperbolic functions; Greatest Common Divisor function. All of the source is included. Version 3.2.13 may include unspecified updates, enhancements, or bug fixes.