Fragrance....

There are five categories of Fragrances...

1. Perfume: Strongest concentration. 15-40% concentrated oils/aroma compounds. This is almost always the most expensive... 20 hours lasting ability or more.
   
2. Eau de Parfum: Second strongest concentration. 10-20% compound. 16-8 hours.
   
3. Eau de Toilette: 6 hours. 5-15%.
   
4. Eau de Cologne: 5-4 hours. 3-8%.
   
5. Eau de Fraiche: 2 hours. 1-3% aromatic compound. This is also known as aftershave. This is the lightest, so if your not into strong scents, then this would probably be the one for you.
   

Eau de Parfum and Eau de Toilette are the most common fragrances on the market.

If you want to learn more: here for the wiki page...