A modern way of sending electronic messages using the internet. It can include text, pictures, and files, and is widely used for both work and personal communication.

A machine that sends copies of documents over a phone line. It was commonly used in offices before email became popular. It prints a paper copy of the message.

A system of communication using dots and dashes to represent letters and numbers. It was used with telegraphs and radios, especially in the military or emergency situations.

A device that allows people to talk to each other over long distances using electrical signals. Invented in the 19th century, it was one of the first tools for voice communication.

A traditional way of writing messages on paper and sending them through the postal service. People used _________ for personal and official communication before phones and the internet.

A live visual and audio conversation over the internet. It lets you see and hear the person you’re talking to using apps like Messenger, Zalo, or FaceTime.

Applications on mobile phones that allow communication, such as messaging, calling, or video chatting (e.g., WhatsApp, Messenger, Zalo). They use the internet to connect people anywhere.

A portable, two-way radio device used to send and receive voice messages. It’s often used by police, soldiers, or kids playing outdoors. It works without the internet.