A modem is a device that sends and receives information between computers using telephone lines.
Modems are important for connecting computers and the internet.
Examples:
The modem helps the computer talk to other computers.
We need a modem to connect to the internet.
She uses the modem to send emails.
The modem is like a telephone for the computer.
Without a modem, the computer can't talk to other computers.
The modem is the computer's friend that helps it talk to other computers.