Television (TV) is a medium of communication, which enables us to send and receive information in the form of moving images. The content displayed on a TV can be black and white or color. Televisions are used for entertainment, for industrial processes and for surveillance. Televisions are also used for guiding instruments and tools where direct vision is difficult, for instance in surgeries.
Television sets became available commercially in the late 1920’s. They are now popularly used to view recorded material. This material is available on video cassettes, DVD’s, laserdisc’s and now on Blu-ray disks. The overall quality of viewing has improved with each successive invention. Watching television streamed through the internet is becoming increasingly common.
Broadcast television uses high-capacity radio-frequency to send out signals to individual receivers. TV sets consist of several electrical circuits. The quality of the material displayed on your television depends on its technical construct. High-definition television (HDTV) and digital television (DTV) are two types of TV. The quality of images varies from one type of television to another.
The shows and content that appears on the TV can serve to educate, inform or entertain its viewers. The most expensive genres to produce are drama series. Reconstructing historical events also involves high costs of production. Popular shows include soap operas and action packed series like crime and detective shows.
Reality television has recently become very popular. Compared to the other genres it is inexpensive to produce. Talk shows and games shows fall under this category. Movies, music shows and comedy television are other popular entertainment genres. | 
