BAY WINDOW
This type of window is composed of three or more individual units. The center unit is parallel to the exterior wall with side or flanking units aligned at 30- or 45-degree angles. Bay windows are often designed with window seats.

BOW WINDOW
A bow window consists of a series of four or more (commonly five) adjoining window units which are installed on a radius from the wall of the building. These windows may be either fixed or operating.