Window Styles  

Double-hung
Both sashes can be raised and lowered and both tilt in for easy cleaning.

1 Section Casement One sash that cranks out away from the house, hinged on the side.  Opens 90° for cleaning.
2 Section Slider
Both sashes slide back and forth.  Panels are lifted out for cleaning.

2 Section Casement Two sashes that cranks out away from the house, hinged on the side.  Opens 90° for cleaning.
3 Section Slider
Two end units slide open and close, center window is fixed.
3 Section Casement One fixed picture window flanked by two sashes that cranks out away from the house, hinged on the side.  Opens 90° for cleaning.
Picture Window
Fixed window that does not open.

Awning
Awnings are an operable window with a sash that tilts out and up, using a crank like a casement.
Hopper
Single sash, hinged at the bottom that tilts in the house from the top.
Bow
Bow windows are a series of windows that are combined to arch out beyond the wall. Both operable and fixed casements may be included in a bow. 
Deadlite                  Fixed window without the master frame of a picture window.

Bay
Bay windows jut further from the wall than bow windows. The windows on the end may be set at 45 or 30 degrees to the wall. Fixed, double-hung or casements can be combined to create a bay window.