Electronic mail, commonly known as e-mail, refers to a system that enables an individual to send messages from one computer or terminal to another over a network, most frequently the Internet. The message is stored until the recipient retrieves and acts upon it.
Skype is a popular Internet communication service that allows users to make voice and video calls, send instant messages, and share files over the Internet. It is widely used for personal and business communications.
Usenet Newsgroups are collections of messages and files shared among users within the Internet-based system of Usenet, serving various interests and topics. They are categorized and accessible through newsreader software.
