hi,
whenever i open a compressed file in pen drive, a temporary file forms
in windows temporary folder, which disappears as soon as i close
compressed file in pen drive. but this temporary file in windows
temporary folder which has though disappeared, can be recovered by using
recovery softwares. so when one works on one's pen drive on some other
person's pc, one is likely to leave one's personal data on that
computer's hard drive. similarily when a cd is made from another cd,
there could be recoverable data left on hard drive. so are there ways to
byepass hard disk for such tasks.

sushil