In computer science a window is a graphical interface to let a user interact with a program. Questions regarding Microsoft Windows should use the "Windows" tag.
A window is an area of the screen containing controls and other objects controlled by a program. A User can use these objects to instruct the program on what to do and the program can use these objects to show outputs related to user commands. A window is an important part of Operating Systems havin a Graphical User Interface (GUI).