República Bolivariana de Venezuela
Ministerio del Poder Popular para la Defensa
Universidad Nacional Experimental Politécnica de la Fuerza Armada Nacional
Ciclo Básico de Ingeniería Asignatura: Inglés I Semestre: II
Actividad asistida # 14
Reconozca las oraciones en voz pasiva, identifique sus tiempos verbales y traduzca las oraciones.
History of DVD’s
Developing the ability to store data for later retrieval has always been important. The first true data storage and retrieval systems were journals and ledgers. While they are still used today, they are slow and inefficient. When the computer was being developed during the 1950s and 1960s, one of their main benefits was their ability to store and retrieve data quickly. This has now become one of the cornerstones of information storage and retrieval. Early computerized storage mediums included such things as punch cards, vinyl LPs, magnetic tape, cartridges, and magnetic disks. As computers improved, so did the data storage capabilities. In the late 1970s, the internal hard drive was introduced. Each of these data storage systems were developed to improve on the convenience and efficiency of the best storage methods available. Many of these systems continue to be improved on even today.
The development of DVD began with the introduction by Sony of the CD in the early 1980s. This new storage medium employed a laser to read tiny pits carved in a disk. The first CD audio players were introduced in 1983. They were useful because it was possible to store more than 75 minutes of music on one disk. That was nearly twice what a vinyl LP could hold. While their acceptance was slow, the CD eventually replaced vinyl records as the preferred medium of choice for audio releases.
