Disco is a genre of music that originated in discothèques. Generally the term refers to a specific style of music that has influences from funk, soul music, and salsa and the Latin or Hispanic musics which influenced salsa.
Elements of disco music appear on records from the early 1970s such as the 1971 theme from the film Shaft by Isaac Hayes (Jones and Kantonen, 1999). In general it can be said that first disco songs were released in 1973, however many consider Manu Dibango's 1972 Soul Makossa the first disco record (Jones and Kantonen, 1999). Initially, most disco songs catered to a nightclub/dancing audience only, rather than general audiences such as radio listeners, but there are many aspects proving opposite tendencies as well; popular radio-hits were being played in discothèques, as long as they had an easy to follow rhythmic base-pattern close to 120 BPM (beats per minute). Most 70's Disco genre songs had a distinctive four/four bass beat.
Karaoke is a Japanese coined word. Kara means empty in English, and oke is a kind of abbreviation of orchestra. The word karaoke itself means the songs without vocals for the sake of the singing at the place where band cannot be prepared (such as small halls, bars, and so on). Today, the word mainly refers to singing with karaoke music, which is very popular in Japan as form of recreation.
Genesis At first (I don't know but it could be in '70s...) karaoke music was prepared with cassette tapes or multi-track tapes and "a lyrics booklet". In those days people were singning songs by referring the booklet.
Cable television or Community Antenna Television (CATV) (often shortened to cable) is a system of providing television, FM radio programming and other services to consumers via radio frequency signals transmitted directly to people’s televisions through fixed optical fibers or coaxial cables as opposed to the over-the-air method used in traditional television broadcasting (via radio waves) in which a television antenna is required.
It is most commonplace in Canada, the United States, Europe, Australia and East Asia, though it is present in many other countries, mainly in South America and the Middle East. In Africa, cable TV has had little success, as it is not cost-effective to lay cables in sparsely populated areas, and although so-called "wireless cable" or microwave-based systems are used, "direct-to-home" satellite television is far more popular, especially in South Africa.