Nobody really knows, but a lot of people have pretty strong opinions.
I have an opinion on this that I would like to share with you. But first, two facts. It is a fact that none of Mentor Software's products use or manipulate the year portion of the date in any way. Thus, none of Mentor Software's products will experience any problems with the year 2000, or any other year up to and including the year 2036. It is a fact that most PC and Unix based software is immune from year 2000 problems due to the rather interesting manner in which dates are maintained by the system software.