Optical disc of light. An early optical disc system existed in 1935, named . An early analog optical disc used for video recording was invented by David Paul Gregg in 1958 and patented in the US in 1961 and 1969. This form of optical disc was a very early form of the DVD (). It is of special interest that , filed 1989, issued 1990, generated royalty income for Pioneer Corporation's DVA until 2007 —then encompassing the CD, DVD, and Blu-ray systems. In the early 1960s, the Music Corporation of America bought Gregg's patents and his company, Gauss Electrophysics. American inventor James
Names given to the Spanish language used was called "castellano". Thus, some Latin American countries formerly under Spanish rule have retained the custom of calling it "castellano", while others eventually switched to calling it "español", with many different factors influencing the final choice. In English, the term "Spanish" relates both to the language and to the nation. The noun used for a person from Spain is "Spaniard", with the collective noun "the Spanish". The term "Castilian" is much less widespread amongst English speakers than the term "Spanish". Two main hypotheses have been proposed for the origin of the word "español": one based on dissimilation in Old