Today on Twitter there’s a tag-meme, #10yearsago. It’s not all that unexpected, given that we’re coming up on another round-number year, but it has special significance to many, because, of course, in 2000, there was a chance that we were facing the End of the World as we Knew It™.

We were wrong, of course, but not far wrong. The disaster we all expected never came to pass, but 21 months later, a different chain of events really did sort of change the shape of our world rather significantly.

But I digress.

On the off chance that someone reading this was living on a desert island that year, or was simply too young to remember, here’s a quick summary of what was generally called the Y2K problem:

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