An announcement was made on the week of April 8th, 2014 that certain versions of multiple Rational products would be end of support on April 30th, 2015. After that date, no support extensions are offered for those versions. For details on what this means and what products are affected, you can find the announcement here.
If you are running the versions affected by this announcement, you might be interested in upgrading to new a version ahead of time instead of waiting until the last minute. Where can you find information on upgrading or updating your product? Fortunately, several awesome support engineers are creating technotes to point you in the right direction.
Here are some of the technotes available, listed by the product and versions affected by the announcement.