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[[OST]]http://www.oncenter.com/products/ost/index.html (On Screen Takeoff) is an construction estimating software system that measures images from .PDF, .TIF and.JPG formatted blueprints. Measurements are normally done with digital plans using a mouse and video screen. Digital plan sets are linked to the stored .TIF files on hard drives in directories. Pad digitizers with styluses can used for traditional paper blueprints. Measurements are stored in an Access or SQL database in conditions, which are organized by construction divisions, specification sections and material types. Selected from style sets of prefabricated conditions, each condition which can be user modified has image layers, height, width, depth assignments and stores up to three measure units such as linear feet, square feet or cubic yards. The program displays the takeoff measurements data, subtotals and the total calculated quantities. A stand-alone component of the On Center Software (OSC) system, OST is linked to the Quick Bid (QB) construction pricing software.