The document discusses intranets, extranets, and electronic communication. An intranet is a private network within an organization that allows authorized internal users to communicate and share information. An extranet allows controlled access to an organization's intranet by external users such as suppliers or customers. Electronic communication refers to communication using technology like email, phones, video conferencing. The document compares synchronous communication which requires real-time interaction versus asynchronous communication which does not require both parties to communicate at the same time. It also discusses popular internet search engines and how to use them to search for nursing-related information.