COMMUNICATION

Communication is simply the act of

transferring information from one place to

another.

Communication is sending and receiving

of spoken or written messages between

people and places.

The different categories of communication include: Spoken or Verbal communication: face-

to-face, telephone, radio or television and other media.

Non- Verbal communication: body language, gestures, how we dress or act - even our scent.

Written Communication: letters, e-mails, books, magazines, the Internet or via other media.

Visualizations: graphs and charts, maps, logos and other visualizations can communicate messages.

Means of communication

Post In India, postal service were started by

British government since 1837. After independent post and telegraph

department of India started providing postal services.

Code Number.

Telegraph Telegraphy is the long-distance transmission

of textual or symbolic messages without the physical exchange of an object bearing the message.

Telegraphy requires that the method used for encoding the message be known to both sender and receiver. Such methods are designed according to the limits of the signalling medium used.

Telegram A telegram  is a written message

transmitted by using an electric device. The message was carried along wires, and the text written or printed and delivered by hand or teleprinter.

Telegrams were very widely used, because private telephones were not usual. Nowadays they are not useful because most people have private telephones and the use of e-mail. The idea was developed by the British post office as a service for urgent letters.

Telephone

A telephone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly. A telephone converts sound, typically and most efficiently the human voice, into electronic signals suitable for transmission via cables or other transmission media over long distances, and replays such signals simultaneously in audible form to its user.

In 1876, Scottish emigrant Alexander Graham Bell was the first to be granted a United States patent for a device that produced clearly intelligible replication of the human voice.

Radio Radio is the technology of using radio

waves to carry information, such as sound, by systematically modulating properties of electromagnetic energy waves transmitted through space, such as their amplitude, frequency, phase or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form.

Television Television or TV is a telecommunication medium used for

transmitting moving images in monochrome (black-and-white), or in color, and in two or three dimensions and sound. It can refer to a television set, a television program ("TV show"), or the medium of television transmission. Television is a mass medium, for entertainment, education, news, and advertising.

Fax Fax (short for facsimile), sometimes

called telecopying or telefax (the latter short for telefacsimile), is the telephonic transmission of scanned printed material (both text and images), normally to a telephone number connected to a printer or other output device. The original document is scanned with a fax machine (or a telecopier).

pager A pager (also known as a beeper) is a

wireless telecommunications device that receives and displays numeric messages and/or receives and announces voice messages. One-way pagers can only receive messages, while response pagers and two-way pagers can also acknowledge, reply to, and originate messages using an internal transmitter. Pagers operate as part of a paging system which includes one or more fixed transmitters (or in the case of response pagers and two-way pagers, one or more base stations), as well as a number of pagers carried by mobile users.

Electronic mail Electronic mail, or email, is a method of exchanging

digital messages between people using digital devices such as computers, tablets and mobile phones. Email first entered substantial use in the 1960s and by the mid-1970s had taken the form now recognized as email. Email operates across computer networks, which in the 2010s is primarily the Internet. Some early email systems required the author and the recipient to both be online at the same time, in common with instant messaging. Today's email systems are based on a model.

Internet The Internet is the global system of

interconnected computer networks that use the Internet protocol suite (TCP/IP) to link devices worldwide. It is a network

of networks that consists of private, public, academic, business, and government networks of local to global scope, linked by a broad array of electronic, wireless, and optical networking technologies.