Just like you did ("proficient with power point and excel"). If you want to highlight those skills, then give some specific examples of how you used the skills.
There is no Microsoft application titled "Proficient." The only reference I can think of that relates to the phrase "Microsoft Proficient," is I have seen it occasionally in job ads to indicate that...
Only Microsoft knows. <- this is completel wrong excel is called excel for a very good reason it stands for a very complicated series of words so micrasoft decided to name it that
The differences between them are not extensive so you can work in Excel 2010 easily if you are familiar with Excel 2007. You can save your files so that Excel 2007 will recognise them.
