Why this online calculator?

Calculator online - much different from a simple calculator? First, standard calculator is not convenient to carry around, and secondly - now the Internet is virtually everywhere, in this not make problems go to our website and use the online calculator.
Calculator online - how it differs from the java-calculator, and calculators for other operating systems? - Once again - mobility. If you are on another computer, you do not need to reinstall So, use this online!
http://calculator-online.org/s/kalkulyator/