Internet-an interconnected system of networks that connects computers around the world via the TPC/IP protocol; created in 1962

Cyberspace-The electronic medium of computer networks, in which online communication takes place.

URL-An Internet address (for example, http://www.hmco.com/trade/), usually consisting of the access protocol (http), the domain name (www.hmco.com), and optionally the path to a file or resource residing on that server (trade).

Website-A set of interconnected webpages, usually including a homepage, generally located on the same server, and prepared and maintained as a collection of information by a person, group, or organization.

Virus-a tiny program that finds its way to your computer and make it sick, then replicate

Backbone-Another term for bus, the main wire that connects nodes. The term is often used to describe the main network connections composing the Internet

IM- Instant Messager

Chat Room-A site on a computer network where online conversations are held in real time by a number of users.

E-mail-A system for sending and receiving messages electronically over a computer network, as between personal computers.

Spam-Unsolicited e-mail, often of a commercial nature, sent indiscriminately to multiple mailing lists, individuals, or newsgroups; junk e-mail

Server-a computer in a network that is used to provide services (as access to files or shared peripherals or the routing of e-mail) to other computers in the network

Packet-a short fixed-length section of data that is transmitted as a unit in an electronic communications network

Client any computer that is connected to another computer by a network

Worm a type of virus

Trojan Horsecomputer program that contains instructions which when activated perform a bad action

Screen Name a name besides your real name that you ue on the internet