Marketing vs. P.R. vs. Advertising vs. Branding

Even after studying Business & Economics at uni for a year I still never worked out the difference between these. I still think its some sort of "I lick your arse, you lick mine" kind of mentality but hopefully these will help explain things better. Yup, you, me and the rest of 7th grade.

Click on the picture below for the full size one.