Andrew, click on the bottom link in his signature. A webcam is normally one that is attached to your computer and then broadcast over the Internet sometimes in real time. In other words, you could have one that is pointed on your lathe and every time you use your lathe it would broadcast it over the Internet. It is also used for a lot of other activities, some of them good, some not so good. Some people use them to blog with or talk over the Internet to other people on their webcam.