This Data Representation Calculator aka Binary Data Convertor is allowing to convert different computer data representations. It capable to convert Decimal, Binary, Hexadecimal, and Octal data into: Binary, Signed Magnitude, One's Complement, Two's Complement, and Excess-M Computer format binary strings of user's choosen length. This app can be helpfull to students at their computer science classes and specially for those who at computer architecture and organization classes, or for anyone who is curious to see how computers are processing/handling numbers.