Television is a system for transmitting and receiving moving pictures and sound over a distance employing a diffusion mechanism. The transmission can be effected by means of radio waves, television networks, cable or satellite TV IPTV. The receiver is the TV signals.The word "television" is a hybrid of the Greek τῆλε (tele, "far") and the Latin visiōnem (Visio accusative "vision"). The term television refers to all aspects of transmission and television programming. It is sometimes abbreviated as TV. This term was first used in 1900 by Constantin Perski in the International Electrical Congress of Paris (CIEP).Television is the mass media per excellence, so that philosophical reflection on them, applies to it.The World Television Day is celebrated on November 21 to commemorate the date in 1996 held the first World Television Forum at the United Nations.