If this is an interview question it is a clever way to find out how inquisitive the candidate is. James Pulley is right to point at the Mercury website, and it is up to the candidate to find a product chronology. It is the sort of question to which the actual answer is "who cares" but which should be answered with "interesting question, I don't know of hand, but I am sure I can find out without much difficulty by ...." (I am not going to provide answers to interview questions, since that is against Forum policy). If people cannot take hints (like James' lead) they are probably not the kinds of candidates you want for the job of QA Tester where a good dose of being curious and able to dig for answers is a prime quality.
Frits - an excellent answer to the questions. However most people do not have the interview skills to do this they seem to think they need specific dates and perfect answers to get through an interview.