The document discusses various communication tools used on the internet including email, chat, logging in/signing up. It provides definitions and explanations of key terms like:
- Email allows sending messages to multiple people and attaching files. It can reach recipients quickly but may be delayed. Authentication is through username and password.
- Chat refers to real-time text-based communication through software like Google Talk or Yahoo Messenger. It requires an account and both parties to be online simultaneously.
- Logging in accesses an existing account for activities like social networking while signing up creates a new account.