You would have heard about y2k problem if you are a millennial. So from beginning - in 1960-70 computer was invented and humankind started to depend on this for his daily work. But for optimisation (for your information I would like to tell you that in earlier times space means a lot. So engineers thought that they should optimize everything in a computer because in previous times 1kb has a very big size like an almirah. So for optimisation engineers did everything for instance they have written 1990 as 90 and 1995 as 95. So here problem starts, the main concern of engineers was that when new century will start then if computer will enter in 2000s or 1900 again, this was main problem but this problem was solved by installing new computer units and old systems were updated.
If This whole incident was taken place then here was very big disaster.
