Bang & Olufsen is a Danish company that designs and manufactures audio products, television sets, and telephones. It was founded in 1925 by Peter Bang and Svend Olufsen, whose first significant product was a radio that worked with alternating current, when most radios were run from batteries.
Beogram refers to turntables and, later, CD players. B&O developed electronically controlled tangential turntables in the 1970's, starting with the Beogram 4000 of 1972. The last tangential tracking turntable was the Beogram 7000, which were taken of the production lines in 1995. B&O has also produced radial tracking turntables.