The document discusses ethical hacking and provides examples of famous hackers like Kevin Mitnick who got into telephone lines to make free phone calls as a teenager. It also shares hackers' tricks to disguise language by replacing letters with numbers and symbols like using 1 instead of i. Additionally, it notes hacking prone areas and that hacking is growing day by day in rate. The document gives a brief overview of hacking history, techniques, and the increasing issue of hacking.