If you were to compare the 20 years 1GB IBM Hard Drive and the 1GB SD card we have now, this is how it is. The 20 year old IBM hard drive weighs up to 30kgs and it is slightly the same size or smaller than the PC case we have today. In 1943, Thomas Watson, the chairman of IBM forecast a world market for “maybe only five computers.” Years before IBM launched the personal computer in 1981, Xerox had already successfully designed and used PCs internally… but decided to concentrate on the production of photocopiers. Even Ken Olson, founder of Digital Equipment Corporation, said in 1977, “There is no reason anyone would want a computer in their home.”