abstract banner set 8 in red green blue

in an otherwise solid, opaque surface through which light and sometimes air can pass. For example, a window in the wall of a house, or a window in a scientific measurement device that permits reading of certain wavelengths.Window is also used metaphorically to refer to a time period during which something can occur and outside of which the thing cannot occur, as in a window of opportunity to launch a rocket to the moon on the most efficient trajectory.The word Window dates back to Old Norse "Wind Eye"; opening to the air. See more at Wikipedia.org...

[ract may mean:Abstract (law), a brief statement of the most important points of a long legal document or of several related legal papersAbstract (summary), an abbreviated summary of any in-depth analysis of a particular subject or disciplineAbstract art, art that does not depict objects in the natural worldAbstract class (see Abstract and Concrete classes), a class in object-oriented programming that is designed only as a parent class and from which child classes may be derived, and which is not itself suitable for instantiationAbstract hip hop, a subgenre of alternative hip hop distinguished principally on the content of the lyricsAbstract music a disambiguation pageAbstract structure, a set of rules, properties and relationships that is defined independently of any physical objects See more at Wikipedia.org...]