Are You Clueless about a File Extension?

From time to time you might get an email from someone that includes a file with an extension that you don’t know what to do with. It’s not “xls” for Excel, nor “wpd” for Word Perfect, nor “pdf” for an Adobe Acrobat PDF reader so what is it? is a must see resource. tries to provide as much detail as possible for each file extension and according to their web site encourages visitors to contact DotWhat if they have any additional information or have an extension that they would like added.
The forum posts are a good place to check out individual problems and solutions – if YOU have a question, someone else has probably already asked the question and received the answer.