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Data Tables in Microsoft Excel 2008

Data Tables let you see how the results of a formula change as its underlying variables change. After entering data, select the entire table and choose Data > Table. Then tell Excel which row input cell and column input cells you want the table to use. Finally, click OK. Excel will crunch the numbers and present a new Data Table.

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Data That Can Be Sniffed at Wi-Fi Hotspots

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You may have heard that the Tumblr app inadvertently transmitted passwords in the clear on Wi-Fi networks, but what else might be at risk? Over at PCWorld, Eric Geier performed an experiment to see what he could intercept over an unsecured Wi-Fi network at a coffee shop. Using a Windows laptop with a wireless network analyzer and a rooted Android phone, he was able to see the Web pages other connected users were viewing, as well as email and unsecure logins. Geier offers a number of tips to improve Wi-Fi security while in public, including always using SSL connections to Web sites, when available.favicon follow link