What is this small port on my laptop? [closed]

I have a laptop that is a couple years old, and noticed a port on the side that I don't recognize. It is small and looks like a USB mini jack, and has a symbol next to it that looks like a computer monitor with two bars next to it.

Does anyone know what this port is, and what's it's for?

Solution 1:

I found it in the manual (laptop is a Lenovo U510). I should have looked there first!

It is a Mini-VGA port.

Solution 2:

This is a Mini-DVI port. Here is a drawing of some common display port types:

Source

Solution 3:

It is a mini VGA port. Even looking at the connectors you can see it could fit.