O = Picture Window, Also known as an o-lite. Is a non-opening window.
X = Sliding portion (vent) of the window. Also known as a sash. Only on horizontal sliders
V = Slider portion (vent) of the windows. Also known as a sash. Only on vertical sliders.
A = Awning (vent) which is hinged at the TOP of the frame to open outwards from the home
C = Casement (vent) which is hinged at the SIDE of the frame to open outwards from the home
XO = Horizontal slider next to an olite (all horizontal sliders have to have an O next to them to slide)
XOX = slider, olite, slider
O/XO – Olite OVER a horizontal slider
A/XO = An awning OVER horiztal slider
O/V = Olite OVER a vertical slider
O/A = Olite OVER an awning
COC = Casement, olite, casement
O/OA = Olite OVER and olite-awning