You click on the hotspot or enter the number of the hotspot to invoke the link. Hypertext is text which points to other text and allows you to jump around in the text without necessarily reading it in a specific order. Hypermedia is a superset of hypertext. It allows graphical and audio representations of links as well. These combined parts are unique on the network and allow the network to know specifically which computer is to receive which electronic packet as well as specifically from which computer the electronic packet came.
Flame is the network name for screaming at someone using either news or lists.
It is very easy for people to quickly and thoughtlessly respond to a news or list posting. It is particularly easy for people who have been using the net for a long time to flame at the new user who asks a question to which everyone knows the answer. Some flames will be very vituperative and scurrilous. This kind of behavior is discouraged. Some people will enter something like flame on to indicate that they are responding emotionally to a particular topic.