The document discusses different types of computer hackers and crackers such as hackers, phreakers, and black hats. It describes the computer underground scene involving warez pirates who trade pirated software, known as "warez". The document outlines how the internet gives worldwide access for people with similar interests to exchange things like credit cards, free software, DVD copies, music, and makes it possible for hackers to use dialup access and bulletin boards to communicate and trade files while making free long distance phone calls.