Whether you’re formatting a hard drive or simply deleting files you’ve dragged to the Trash, Mac OS X Leopard offers options for securely deleting the data you no longer need but don’t want anyone else to access. Find out how you can take advantage of Leopard’s secure delete options by watching the latest Quick Tip of the Week.

Piggyback loans, death bonds, shareholder mansions, ear marks — if you’re puzzled by financial jargon, get the skinny on less-than-clear economic lingo from iTunes U. Money 101: Buzzwords, an excellent audio podcast from American Public Media, takes about a minute to explain arcane financial buzzwords in terms we all can understand.

When National Geographic photographer Steve Winter reviewed his Snow Leopard images in Aperture, he was literally seeing them for the very first time. Knowing Snow Leopards to be notoriously camera shy, Winter set up 14 camera traps to capture remotely the photos selected for the recent National Geographic article and gallery — just a small sample of the 30,000 he edited and processed in Aperture.