A USB flash drive, which fits on your keychain, can do a whole lot more than just shuttle files. It can be set up to run a browser, IM software, even antivirus, and antispyware. This is a comprehensive article on the topic.
Most people don't realize that these drives can also carry enough applications to serve as a personal office on the road, and can even contain a complete bootable operating system to provide total security when you are computing away from home. There are plenty of reasons to carry applications or an operating system on your USB drive: You'll have your e-mail and instant messaging accounts, Internet bookmarks, log-on passwords, and even document templates instantly available on any computer you find in a hotel's computer center, a home, or an office that you might visit. You can also be certain that your settings will stay on your USB drive and won't be stored in the browser cache or anywhere else on a remote machine. Here's what we put on our ultimate USB drive; the programs are free for personal use, unless noted. Most of the apps we describe can run entirely from the USB drive without installation.
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