The earliest CDnbsp. (contractnbsp. Disk), published by Philips and Sony in 1980, was originally designed only for the consumer market of household appliances. At first, I didn't think that computers could use CDs in the future, because there were no 286 computers at that time, and the data storage of computers was still in the stage of 5.25-inch floppy disks, and even 3.5-inch disks were not invented. “l9p0O-Wnbsp； KnbspH5r Before the invention of CD, the sound system was analog. Most of the sources of music are LP records, radios and tape recorders with a diameter of 30cm. Before the invention of CD, there was no digital sound at all, so CD can be said to be the greatest invention after relay crystal. Since CD appeared in the audio market, analog LP records with a diameter of 30 cm began to fade out (although there are still a small number of die-hard audio enthusiasts who have never given up the traditional analog records, after all, only a few). Since the invention of CD, all similar products related to CD, including DVD, have been derived from it. 1 H7 pnbsp； Vnbsp of the European union. Cnbsponbspb: at the beginning of YCD CD 1980, it is an AudionbspCD, also known as CD-DAnbsp；; (number nbsp；; Audio), since then, due to the development of other media markets, a series of CD specifications and products have been continuously introduced: Gremo amp#823 1; Marconi (Italy), popov (Russia) (190 1 year) nbsp Inventor of washing machine: Fisher (USA) (190 1 year) nbsp Inventor of electric lamp: Joseph Ampere; #823 1; Swan (UK), Edison (USA), Milla Nell (USA) (nbsp1878-1913 years) nbsp TV inventor: Ferroamp#823 1; Farnsworth (USA), John amp#823 1; Bayaldi (UK), Vladimir amp#823 1; Zvolykin (Russia) (1908-1928) nbsp; Inventor of tape recorder: Marvin Ampere; #823 1; Kamras (USA), Friob B. Moore (Germany) (1935) nbsp; Inventors of electronic computers: atanasoff, Mochili and Feng amp#823 1; Neumann (USA) (1946) nbsp; Inventor of microwave oven: Raytheon Company of America (1947) nbsp; Many of them were invented by enterprises or research institutes. There is no concept of inventor, is there? Nbsp; Some more important products are usually jointly developed by many companies. For example, Mp3, the main patents belong to Philips and Thomson, and so does dvd Alliance. . It is worth mentioning that vcd is said to have been first produced by Hisense in China. . . In addition, China's Lucent Company claims a patent right. . . The technology of nbsp printers can be traced back to Xerox and Epson, but at present, patents are scattered in the hands of Kodak, Hewlett-Packard and many other manufacturers, not to mention who invented them. . . Nbsp; There are many theories about computers. If we only refer to the Pc we use, then the compatible computer first introduced by IBM and the home computer introduced by Apple can be the inventors respectively. Similarly, a Korean company is the first manufacturer of mo3, but it is not the first in terms of technology. . Nbsp; the following are some recognized dates of technological invention. I'm not in the history of technology. I will write them purely by impression. Please refer to them. Your question is too complicated. . Nbsp; telecommunications/energy. Sound media nbsp. Video media nbsp text media nbsp. Steam engine. 1784。 Loudspeaker nbsp1670nbsp; Camera nbsp 1827. Movable type printing machine 1450 nbsp； Telegraph nbsp 1837. Phonograph nbsp 1877. Photographic negatives. 1839。 Flat printing pressnbsp; 1800 nbsp； Mures codenbsp; 1844nbsp microphone speaker. 1878。 Color photos nbsp1861nbsp; Typewriternbsp; 1837。 International submarine telegraph cable. 1850 nbsp； Magnetic recording nbsp; 1898。 Audio moviesnbsp1900nbsp; Web-to-print pressingnbsp; 1868。 Telegraph typewriter 1855nbsp sound radio broadcasting. 1906nbsp Black and white TV set nbsp 1926. Copying machinenbsp1938. Code information recorder (paper tape punch) nbsp. 1858nbsp stereo radionbsp1925. Color TV set nbsp 1928 electronic digital integral calculator (early computer) nbsp 1946. Wired telephone. 1876。 Transistor radio. 1954nbsp Lasernbsp1960nbsp; Word information processor. 1964。 Radio transmitter nbsp. 1896。 Walkmannbsp。 1978。 Satellite TV nbsp1983nbsp; Personal computersnbsp; 1978。 Radar nbsp1933-5nbsp; Satellite nbsp 1957. Integrated circuit. 1959。 Optical fiber. 1980 ' snbsp； Satellite phone. 1990 ' snbsp； Videophone nbsp2000