For example, your e-mail address on the OCF has ocf. In most cases, it doesn't matter if letters are upper case or lower case. Names identifying computers on the Internet are composed of several words separated by periods. The rightmost 2 words identify the domain in which the computer is located. The rightmost word identifies what sort of organization the computer is owned by or the country in which it is located.
Most sites outisde the United States are in domains named after the country.
Each word after the domain as the address is read from right to left specifies a further subdomain, and the leftmost one specifies the actual name of the computer. The machine is in the educational domain since it ends in .edu . The machine is somewhere at the University of California at Berkeley since the next part is the world Berkeley . The next subdomain listed is EECS , which is the department of Electrical Engineering and Computer Science at UC Berkeley. Finally, the name of the machine in the EECS department at Berkeley is cory.