PIP works with almost any kind of a removable storage device, from a USB flash drive to a FireWire-equipped digital camera. Upon installation, PIP copies your e-mail account (messages and contacts) to your selected removable storage device. It also copies personal Internet data such as History, Favorites, temporary files, cookies, AutoComplete entries, and URLs typed at the Address bar. After transfer, if you want, it can also overwrite and delete the original data.
At this point to check your e-mail or surf the Web privately, you can plug your portable device into any computer and launch PIP, which resides on the portable storage device. All of your private data remains on the device; none gets written to files on the computer. After you shut down PIP and pocket your device, you'll leave no trace of your activities.