@mur2501 a latte is steamed milk with a shot of espresso in it, which, at least according to the instructions for my instant espresso, is 60 mL of coffee, made of Robusta beans. regular black coffee is made of Arabica beans. they taste distinctly different.
a tall latte is a big one, a short latte is a small one.
a double latte has two shots of espresso.
i usually order a short double latte, which gives you more espresso and less milk, and less liquid in total.
oh, and a cappuccino is basically the same as a latte, but with more foam on top.