This article first appeared in the November-December, 2018 issue of IEEE Spectrum magazine.
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A computer is a tool for doing complicated calculations.
A traditional computer is much simpler, using only bits and bytes.
And an old computer is far from perfect.
In the early 1990s, Intel introduced the Pentium 4.
Its successor, the Penta, is still around.
And Apple and Microsoft introduced their first computers, the Apple II.
But these days, even the best computers are often old and outdated.
For a recent article on this topic, check out the IEEE Spectrum story: Which is best: a computer, an old machine, or a modern one?