whoever57 (658626) writes "According to Prof Kubiatowicz from University of California, Berkeley, each time an additional book is downloaded to an ereader, the mass of the ereader increases. The effect doesn't really make the devices more difficult to carry: the professor calculates that 4GB of books adds 1e-18g. to the mass — about the mass of a single virus or DNA molecule." Link to Original Source
Mathemeticians stand on each other's shoulders while computer scientists
stand on each other's toes.
-- Richard Hamming