Abstract: A clean room covering or enclosure for a portable computer, wherein the computer has a keyboard portion and a screen portion connected by a hinge foldable between closed and open positions. The enclosure comprises a flexible sleeve for receiving the keyboard portion of the portable computer, with the sleeve having an opening through which the keyboard portion is inserted and removed, a transparent portion for viewing and operating the keyboard and a gas permeable vent portion adapted to restrict flow of contaminant particles. A flexible flap extends from the sleeve portion and is adapted to wrap around and over the screen portion of the portable computer, and has a transparent portion for viewing the screen. The enclosure also includes a reclosable seal for securing the flexible flap around the screen portion. The reclosable seal preferably secures the flexible sleeve opening to restrict flow of contaminant particles.

Abstract: A method of transporting workpieces to tools in an automated transportation system dispatches an automated transport vehicle containing workpieces from a first location such as a first loadport to a tool when the automated transport vehicle is available for dispatch and loaded with the workpieces, irrespective of whether the tool is available to receive the workpieces. Next, the method directs the automated transport vehicle to travel from the first loadport, along an interbay loop to an intrabay loop. The intrabay loop comprises a transport route around the tool and the interbay loop comprises a transport route that connects the loadport to a plurality of intrabay loops. The method directs the automated transport vehicle to travel along the interbay loop and stop at a tool loadport of the tool only if the tool is available to work on the workpieces.