How many different fire extinguishers?

There are 6 different types of categories for extinguishers.

Class A: SOLIDS such as paper, wood, plastic etcClass B: FLAMMABLE LIQUIDS such as paraffin, petrol, oil etcClass C: FLAMMABLE GASES such as propane, butane, methane etcClass D:METALS such as aluminium, magnesium, titanium etcClass E:Fires involving ELECTRICAL APPARATUSClass F:Cooking OIL & FAT etc