A starter block and a shingle are utilized to form courses that may be positioned in overlapping fashion on a roof to form a roofing covering system. The number of shots is determined in order to completely fill k-space to be scanned. The XML distribution rings enable the XML documentsmessages to be exchanged without requiring the XML appliancesrouters to run a routing protocol to determine how XML documentsmessages should be distributed through the network. Although the primary engine can maintain the vehicle at a cruising speed, it relies upon the added power of the auxiliary engine for acceleration and hill-climbing. Upon subsequent executions of the computer program, if the list prefetcher cannot track the prefetch list to the computer program, the list prefetcher waits until the computer program outputs the next checkpoint indication.