[Stooky Bill]

For the case of the Millennium Bug, it was just the fear of computerised systems around the world malfunctioning when the first two digits of the year changed from 19 to 20, and it turned out to be a damp squib anyway!

It was only a damp squib because a lot of work took place beforehand to ensure any potential problems didn't happen. It was a real problem 

There were a few isolated occuramces of computers getting confused with the change of century in the lead up to 2000, however they were mostly things like 104 year olds getting letters about starting school. I don't think there were many occurances were they got confused and shut down