Abstract: To create a snapshot copy of selected elements of a database in a data processing system, the selected elements are copied sequentially to a secondary storage device. During the copying operation, when a task requests to delete one of the selected elements from the database before it is copied to the secondary storage device, a record is made to identify the requested element, the task is allowed to continue processing. After the element has been copied to the secondary storage device, the identified element will be deleted based upon the record. Also, during the creation of the copy, when a task requests to update one of the selected elements, a duplicate copy of the requested element is created and the task is allowed to update the requested element. When it is time to copy the requested element to the secondary storage device, the duplicate copy will be used.

Abstract: In operating a computer system which has changeable operating characteristics and configurations, the operating characteristics and configuration of the computer is investigated at each initialization thereof. In response to the results of the investigation, a system control program is customized to the current operating characteristics and configurations so that it can provide control of the computer system.

Abstract: A process for cleaning both polar and non-polar residue material from screening masks, wherein the mask is contacted with a liquid solvent that at least includes a solvent selected from the group consisting of N-Cyclohexyl-2-Pyrrolidone, N-Isopropyl-2-Pyrrolidone, Ethyl Hexyl Acetate, Dibutyl Cartitol and MAGIE OIL #543.