COMMUNICATION :-
- 'Communication' derive from Latin Communicare, meaning to Share
- Communication are Two Type namely 1. Personel Communication 2. Mass Communication
- Personel Communication are 1. Letters 2. Telephone, 3. Telegram 4. Fax 5. Email 6.Internet7. Postel Services 8. Mobile Phone
- Mass Communication are 1. Radio 2. Television 3. Cinema 4. Satellite 5. News Paper 6.Books 7. Magazine 8.Public Meeting 9.Seminar 10. Conference
TELEPHONE :-
- Telephone is a form of Oral Communication
- Telephone Was Invented Alexander Graham Bell (10tht March 1876 )
- STD – Subscriber Trunk Dialing
- ISD - International Subscriber Dialing
- SMS – Short Message Service
TELEGRAM :-
- Telegram is form of Written Communication, message send quickly to distance place
- Telegram was Invented Samuel Finley Breeaw Morse (1837)
FAX :-
- Fax was Invented Alexander Bain (1843)
- Fax Means Facsimile
E-MAIL :-
- E- Mail was invented Shiva Ayyadurai ( 1979 )
- E-Mail Copyrighted 1982
- E-Mail means Electronic Mail
INTERNET :-
- Internet (WWW) was Invented by Tim Berners-Lee (T.B.Lee) (6th August 1991)
- WWW – World Wide Web
POSTEL
SERVICE :-
- Indian Postal Service was introduced 1837
- Indian Postal Service is the Largest Postal Service in the World (1,55,618 Post Offices)
- People send Parcel and Mail
- Mail has Classified 1.First Class Mail 2. Second Class Mail
- First Class Mail are 1. Post Cards 2. Inland Letters 3.Envelopes
- Second Class Mail are 1. Book packets 2. Registered News Paper 3. Periodicals
- V.P.P means Value Payable by Post
RADIO :-
- Radio Was Invented by Guglielmo Marconi ( 1895)
- 1909 Noble Prize for Physics (Radio Work)
- Radio works ( Radio Waves ie Electromagnetic Waves (unit Hertz Hz)
- In British India 1923, broadcasting Started by Radio Club of Bombay
- 1927 Private Indian Broadcasting Company Limted was Operate two Radio Stations1. Mumbai Station 2. Calcutta Station
- Government took over Broadcasting Service, Indian State Broadcasting Service (ISBS) in 1930
- Name Change in 1936 All India Radio (AIR) (Headquarter Delhi)
- Name Change in 1957 Akashvani
- John Logie Baird was Invented Television
- Television Broadcasting started in India 1959 in Delhi
- 1972 Television Broadcast extented in Bombay and Amritsar
- 1976 Television Broadcast separted from Radio Broadcast (Doordarshan (DD)
SATELLITE
COMMUNICATION :-
- INSAT – Indian National Satellite System
- IRS – Indian Remote Sensing Satellite System
- INSAT – Established 1983
- PSLV – Polar Satellite Launch Vehile
- NRSC – National Remote Sensing Centre at Hydrabad
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