TechCalc64 Sci Calculator

A scientific calculator for engineers.

TechCalc64 has the following features.

- 64bit integer calculation, it's useful for calculating 64bit memory address.

- binary and hexadecimal mode. It's easy to change radix with one button.

- bit shift keys('<<' and '>>' keys) in bin and hex mode.

- back space key.

- log2 key, It's useful to check the required bit width of a number.