The third place to find the year-2000 problem is, unfortunately, largely overlooked. The third problem is hidden in data. The answer depends on the spreadsheet being used. These two popular spreadsheets provide different answers and very little documentation. Technically the year-2000 problem is not very challenging.
Several techniques are available to help embedded process controllers.
What makes the problem difficult is two related issues. One, many different areas must be examined and fixed. Invalid date comparisons can occur in computer programs, training, embedded processors, and in existing data. This becomes a massive inventory, remediation and testing campaign. In short, it requires an extensive management effort to prioritize and execute a plan that will avert problems in time.