Reference (computer science) In computer science, a reference is a value that enables a program to indirectly access a particular datum, such as a variable or a record, in the computer's memory or in some other storage device.
For a standard-size, double-hung, double-pane (energy efficient), vinyl window, expect to pay between $450 and $600, including installation. Wood windows are more expensive. The cost of a wood replacement window can range between $800 and $1,000 per installation. If the entire window and framing has to be removed (down to the studs), be prepared to add at least $50 to $100 per installation.
How much does it cost to install or replace windows? Windows are an integral part of every home. They let in sunlight and air, and provide a view to the outdoors. No window lasts forever, though, and it's common to need to replace your windows roughly every 20 to 25 years, if not sooner.