Today communication is possible at the press of a button. A telephone allows us to talk to a person living at a distance. with mobile phones we can talk to a person anywhere, at any place and at any time. We can send an SMS message at a reasonable cost to people in far-off countries. Improved technology has enabled us to see the person on the phone screen while we talk to him or her. Fax machines transmit an exact copy of handwritten or printed material and pictures through the the telephone cables. E-mails on computers which use telephone lines is a quicker and cheaper method of sending messages.