No matter what they're called, all ways of brewing coffee are basically the same: The ground coffee is soaked in the water until the water tastes good. The only equipment you really need to make great coffee is an open pot, a flame, and, possibly, a strainer.
There are many ways of brewing coffee. The Key Factor in brewing coffee is the extraction time , the contact time between hot water and the grinds, and the water temperature. Each brew method extracts the aroma and flavours of coffee differently.
Coffee Brewing Methods:
Extraction
Caffeine
Tannin
Pressure Brewing
Hot water is forced through the ground coffee and filter under high pressure. This is how today's espresso machines work.