Because the Internet includes so many different types of networks, there are some variations on the basic address format. Some addresses can be shorter or longer. In large organizations, this part of the address may be further divided to show the site or department names. Some parts of an Internet address you can decipher on sight. At or near the end of an address, you may see any of several standard three-letter abbreviations that indicate the location or type of organization.
Some addresses also describe the geographical location of the computer.
To send an e-mail message, the sender must know the address of the recipient. There are, however, tools that help people find one another on the Internet. Different search engines ask for different types of information Netiquette-a complete guide Watch your tone. Avoid offensive language and humor. Be polite and to the point.