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Investors should test multiple subperiods to mitigate the bias that may result from arbitrary starting and ending points ( known as endpoint bias ) . StoneBeat FullCluster interconnects multiple systems to form a scalable high-throughput firewall cluster . My screen displays 47 lines at a time , and most of my email messages are shorter than that , so I rarely have to scroll through multiple pages to see if I need to keep or act on a message . We also need to build communication frameworks across multiple units to ensure that all parties are moving toward the same goals . This allows multiple readers to run concurrently . Grid computing unites pools of servers , storage systems and networks into a single large arrangement that delivers the power of multiple systems to a single user point for a specific purpose . A popular method of avoiding this is to designate a fixed number of products to appear , and then have multiple pages to view the other products on the list . It 's not only more secure but also more modern and advanced , with tabbed browsing , which allows multiple pages to be open on one screen , and a better pop-up ad blocker than the belated one Microsoft recently added to IE . This month 's round-up of plug-ins and XTensions includes tools for adding multiple pages to Illustrator , creating catalogs in InDesign , correcting image distortion in Photoshop , and copying attributes in QuarkXPress . A general requirement when using multiple networked systems is " single sign-on " - authenticating once and then sharing the result of authentication with multiple systems to avoid repeated authentication .