There are diverse habits concerning not only the ways of drinking coffee – in Ethiopia some salt is added and in Morocco they ussually put a bit of pepper – but also in the preparation methods:
Formats and versions of coffee:

Espresso: Darker and more intense than filtered coffee.

Expresso macchiato: One part of milk is added on top of the espresso coffee

Viennese coffee: Simple or double espresso coffee, covered with whipped cream

Ristretto: More Dark, prepared with half the water found in an espresso. Concentrated and with less caffeine than an espresso.

American coffee: Lighter and longer coffee.

Espresso with milk: Coffee with added milk.

Coffee drop: Milk with added coffee.

Cappuccino: The espresso is served on a big mug with added foamy milk.

Irish Coffee: Eight parts of espresso coffee with one part of whisky and sugar. Whipped cream is placed on top.