Here are the classes of tomatoes that burpee uses:
Slicers and Beefsteaks: Large, up to two pounds. Great for sandwiches, salads, and fresh eating.
Varieties: Fourth of July, Heatmaster, Bobcat, Celebrity
Paste: Cooking variety, meaty with little juice. Great for sauces, salsas, and ketchup.
Varieties: San Marzano, Roma VF, SuperSauce, Gladiator
Cherry: Small, up to an inch. Great for sweet snacking and salads.
Varieties: Sungold, Super Sweet 100, Two Tasty, Veranda Red