The Complex Number Calculator Precision 18 is a powerful software tool designed for scientists, engineers, teachers, and students. It can calculate any mathematical formula of any length and complexity, making it an essential tool for anyone who needs precise calculations on a regular basis.

One of the standout features of this calculator is the ability to store calculation history, either as a text file or printed out. Additionally, there are ten variables or constants available for storing frequently used numbers, as well as a prebuilt Common Constants list with fundamental constants and an Unlimited User Constants list.

The precision of calculations with this calculator is 18 digits, making it a powerful tool for handling trigonometric, hyperbolic, inverse, and combinatorial functions. Furthermore, users who are familiar with the College Scientific Calculator series and Scientific Calculator Precision 54 will find that this calculator is backward compatible with those models.

It's worth noting that some buttons have been duplicated in Complex Number Calculator Precision 18 to ensure compatibility with College Scientific Calculator formulas. For example, the Mod button works in the same way as the abs button, while the mod button represents modulo. Additionally, there are duplicate buttons for the principal value of complex Log (Log) and ln, as well as log(z) which works as Log(z)/ln(10) for complex z and as a decimal logarithm for real z. Be aware that in Complex Analysis, log denotes a multi-valued function log(z) = Log(z) + 2*pi*n*i.

Overall, Complex Number Calculator Precision 18 is a handy, fast, reliable, and precise tool for performing complex calculations.

Version **1.0.1.1**:
version checker is added

Version **1.0.0.6**:
Trial scheme improvement.

Version **1.0.0.5**:
Corrections

Version **1.0.0.4**:
Improved combinatorial function Combinations. New signature.

Version **1.0.0.3**:
All text-boxes got uniform right-click menus.

Version **1.0.0.2**:
N/A

Version **1.0.0.0**:
N/A