Are the baggage-scanning machines used at airport security stations powerful enough erase the data on a USB keychain drive?
Those small USB drives store data in solid-state flash memory, which has no moving parts. Flash memory is generally more resistant to environmental factors than diskettes and hard drives that store data magnetically. You should check with the manufacturer of your device to make sure your drive will be safe at the airport. The USB Flash Drive Alliance has links to many manufacturer Web sites at http://www.usbflashdrive.org/ How are onscreen program listings updated for televisions that get their broadcasts over the airwaves and don’t use cable? Although most of the broadcast television signal is video, there are also some data streams that go along for the ride. This information is embedded in a part of the signal called the vertical blanking interval. Sending the information along that way is sometimes called datacasting. In addition to television listings for each channel’s daily schedule, other types of nonvideo information, like closed captioning, can be embedded. What is the differ
