Answer: WINDOWS

AnswerCrossword Clue
WINDOWSSome are bays
WINDOWSHoles in the wall?
WINDOWSCasements.
WINDOWSCasements
WINDOWSHairless patches on pelts
WINDOWSVista system
windowsA computer operating system with a graphical user interface
windowsWINDOW, to provide an opening for air or light