Portable scanner, reviewing the basics
Most people would find it much too difficult to deal with data in hard paper format. Consider the disadvantage you would be in if you had to work somewhere without access to the modern world's wonderful information technology facilities. However, if only you had access to a portable scanner and a computer you would be able to work from practically anywhere. You can convert all those troublesome documents into electronic format quickly and easily, and use your personal computer to do with them as you please. Without a portable scanner all the information in the world is ancient and more or less unusable.