Microsoft Excel Functions and Formulas

Moriarty Brian :
Brian Moriarty is a Microsoft Office Specialist Master who has been automating Office products for more than 20 years; he also teaches employee groups at the corporate level.

Held Bernd :
Bernd Held is the author of more than 40 books and Microsoft has recognized him as an MVP (Most Valuable Professional).

Richardson Theodor :
Theodor Richardson is the Associate Vice Chancellor for Academic Affairs at South College and has written several books in areas of computer science.