... RAM in today's PC's, indicates how small the hardware development was at in the early 80's. The software built for this was extremely basic, using DOS version 1.0, but only as an option. The software was not the main selling point of the PC. It was marketed for its hardware, i.e. this was a revolutionary machine that could save large quantities of data files on to discs no bigger than a hand, from which it could be edited and re-saved, a major advantage on the manual way of work. Software was created to enable the hardware to work correctly. It was not until later that it was the hardware that was constructed for the software requirements. 1988 saw the emergence of DOS version 4.0 which was released for the PC. This version of DOS used the full hardware capacities at the time, even the fastest Central Processing Unit, the Intel ...

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