Letters Letters, written alphanumerics on paper, serve as one means of telecommunications. Although hand- written letters have a personal touch, their deliver to the receipient is slow. Telephones, faxes, and electronic mail Modern telephones and fax and e-mail communications often go through satellites for complete transmissions. No wire extends as far as Earth's orbit. Radio and Television Radios have been used for years now in audio communication.
Television combines audio and video for information and entertainment.
The age-old art and science of communication known as telepathy can be used for communication at truly great distances. In fact, this method may have no physical barrier. On this web site, you will find out about how cell phones work, their history, pros and cons, and future applications.