**Binary**,

**Octal** and

**Hexadecimal (Hex)** number base related and associated calculators, conversion charts and converter programs available for use. There are some also dealing with powers and other number bases. Some of these are directly related to interest in the computer user's community and some are of indirect interest; some are of direct interest to the mathematical community and some are of interest to those with time as a hobby or profession. We have written these or provided these for both special use and educational purposes and convenience. Some are written as demonstrations of programming techniques and others have highly functional uses. We are always receptive to comments or suggestions you may have. Enjoy!