How many types of golf bags can you get?

Tour/staff bags- These are carried by the professional Golfers' caddies, big heavy bags with plenty of pockets, usually made of leather. Stand bags, these are slimmer lightweight bags with a few pockets, and a stand on the front so it can stand up when you set it down, these bags usually have a double strap for convenience. Cart bag, these are quite chunky bags, usually used with a trolley, probably half way between a tour bag and a stand bag. The final type is a pencil bag, this type has only one or two pockets and can hold a full set of clubs, it is designed for a casual round where maybe not all the Golf clubs will be carried round. They are very light weight.