There are about 850 varieties worldwide Some are dessert/hot climate varieties and some can produce 2 crops in one. Some are good for eating as they can be very sweet, and some are good for drying and canning. Some can also withstand very cold winter temperatures down to -15 deg C the tops may die off but they reshoot from the base.
For production its is normal to confine there roots, to make the tree grow less tall and also maximize production
There are two fruiting types, those that only have 1 crop per year sometimes known as UNIFERES, and those that can produce 2 crops sometimes known as BIFERES. Obviously in the UK outdoor climates single crops are best, but if given protection 2 crop types can be grown. The first crop is known as the 'first or breva' crop, whilst the second crop is known as the 'main' crop.