human
What are the most important things I should know about the Y2K problem?
assistant
1.  The Y2K problem refers to a potential issue that could arise from using two-digit years in computer programming, such as software and databases, which were not designed with the year 2000 in mind.
2.  Many of these programs may have been written assuming there would be at least four digits in every date field, so they will likely break when the year changes from 1999 to 2000.
3.  There is no way to fix all of these systems quickly or easily, so some businesses may experience problems due to the change.
4.  It’s best to check your own systems for any issues before the new year arrives.