At present, information technology is so tightly invaded into our daily lives that many of us just can not think of himself without a PC.

Personal computers play an important role in human's being. If we ask somebody what things are valuable for him, a lot of people, obviously, will name a computer.

Portable Document Format (PDF) is a file format, developed by Adobe corporation. It is easy to use it for the internet transmission of files. In this article you will find everthing about it.