The world’s first hard disk couldn’t be bought as an individual device. You had to get the computer with which it came. The computer, IBM305 RAMAC, itself was only available on lease for $3200 per month.
John D. Kubiatowicz, a Professor at the University of California at Berkeley, estimated that the Amazon Kindle ebook reader gains 10^-18 grams when it's fully loaded with books. The calculation is based on the number of electrons that are actually used to store the books! [more...]