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computer so you can reconnect the two cables to the motherboard. Snap the cover into place by pressing around its edges and replac e the seven screws. Replace the magnet over the center-rear screw. 18 Close the display and turn the computer over. Reconnect the hard-drive cable to the motherboard and replace the two top-cover screws beside the battery bay. 19 Replace the DC-In board and se cure it with th two screws. Reattach its cable to the motherboard. 20 Replace the metal bottom shield and secure it with the four best free psd website templates Phillips screws. 21 Replace the two springs you removed from the battery bay and lay the bottom case on the computer. Press along its edges to snap it into place. Replace the two screws in the battery bay, the three corner screws and their rubber feet and the Bio Limousin Moteur de recherche three Torx screws. 22 Turn the computer over and open the display. Lay the keyboard face-down on the palm rest. Replace the AirPor .

aining tabs, press the rear edge of the keyboard down into place and release the tabs. 24 Close the display and turn the computer over. Insert the battery into its bay and use a flat-blade screwdriver to turn the battery lock 14 turn clockwise to secure it.Fir st Hard Drive In 1956, IBM created a computer called the 305 RAMAC. This computer was the first to come with a hard disk drive. Th e drive had a capacity of 5 MB. Because the hard disk drive weighed a ton, it was still impracticable for use in homes. IBM and ot download free wedding css templates her computer companies began to refine the storage-drive medium. In 1971, IBM introduced a technology called the floppy disk, a va riation of which is still used today. First Portable Storage Device The floppy disk is a data-storage device composed of a circula Bio Limousin Moteur de recherche r piece of thin, magnetic storage medium. The medium is enclosed in a square or rectangular piece of plastic. The floppy disk is r .

1980s. the first optical devices were released. A compact disc is a disc used to store digital data, such as audio and files. The first CDs were released by Sony and Philips in 1980, after over a decade of research and work. The CD-ROM is a drive that uses th e same physical format as a CD. Introduced in 1985 by Sony and Philips, the digital information is encoded at a size that allows l arge amounts of information to be stored approximately 650 to 700 megabytes of data. First Electronic Devices In the 1990s, severa putting library pdf ebooks on your nook l electronic storage devices were developed. These small devices are used inside portable electronic devices such as cell phones a nd digital cameras. Most modern computers now include card readers that can can read and write onto the small electronic storage d Bio Limousin Moteur de recherche evices. In 1997, Toshiba released the Multimedia Card, upon which the currently widely used Secure Digital card format is based. I .

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