Tnpsc Group 4 Geography Notes for all Competitive exams ( Communication ) ( 10th SSG )

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.Internet
    7. 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 )
  • STDSubscriber 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)
  • WWWWorld 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 Stations
    1. 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

TELEVISION :-
  • 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
  • IRSIndian Remote Sensing Satellite System
  • INSAT – Established 1983
  • PSLVPolar Satellite Launch Vehile
  • NRSCNational Remote Sensing Centre at Hydrabad





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