During work and play, many times one has to make ‘back of the envelope’ calculations. Sometimes it is hard to get a perspective on scale and various aspects of big data – numbers like millions and billions or even GB/TB/PB et al. So I have started collecting a few representative numbers that can add perspective to any calculation. Please suggest more … PetaByte vs ExaBytes vs ZettaByte vs YoottaBy
![BigData Counts](https://cdn-ak-scissors.b.st-hatena.com/image/square/961000d07cc3218481e3997f3c46da478c21a796/height=288;version=1;width=512/https%3A%2F%2Fdoubleclix.wordpress.com%2Fwp-content%2Fuploads%2F2011%2F11%2Fslide12.jpg%3Fw%3D300)