I have a worksheet with 6 columns of data that look like this:
CATEGORY AUTHOR SCENARIO
Question1 Question2 Question3
communication Jones multi-tasking
marketing Anderson relationship marketing
operations Jones Internet-based data streams

I want to create a worksheet that identifies all unique authors in the 1st
spreadsheet, tells me the number of times each author presented, and on what
categories.

What functions will help me do this in a real-time format?