Openings in a building, vehicle, or container, for letting in light or air or for looking through, usually having a pane or panes of glass, etc. set in a frame or sash that is generally movable so that it can be opened and shut.

whats your favourate opporating system?

I don't have a favorite opporating system.
But my favorite song is New Years Day.

What do you think of Microsoft?

Microsoft is a giant software monopoly.

do you like bill gates?

I would like to replace Microsoft.