One example - a couple of years back, someone swore to me that they knew of at least one system in use that could still calculate in pounds, shillings and pence -- which meant the code must have have been somewhere around 45 years old and still running unchanged.

It pretty much managed it, at least in the richer parts of the world.

Your PC is already not your father's PC anyway: that beige box with a floppy disk drive has been replaced with a sleek notebook that splits into two or does other kinds of gymnastics as required.

One option, for those that can, is to spread the risk by making PCs just one part of a broader business: that way selling PCs becomes a good way of getting a foot in the door to then sell the more expensive enterprise gear.

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