Displaying a list and showing a map is one feature of Yelp, but you could also say showing "hello world" in 3D text with OpenGL is a 3D graphics engine. In the

Displaying a list and showing a map is one feature of Yelp, but you could also say showing "hello world" in 3D text with OpenGL is a 3D graphics engine. In the real world they are both complicated things.