Easy Computer Basics, Windows 7 Edition

2017-07-07 02:10:07

CD-ROM discs look just like the compact discs you play on your audio system. Data is encoded in microscopic pits below the disc's surface and is read from the CD-ROM via a drive that uses a consumer-grade laser. The laser beam follows the tracks of the disc and reads the pits, translating the data into a form your computer can understand.

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DVD Versus CD

Many new PCs come with combination CD/DVD drives. DVD drives work just like CD-ROM drives, although DVDs can hold more data 4.7GB versus 700MB for a typical CD-ROM. In addition, most DVD drives play full-length DVD movies, which turns your PC into a mini movie machine.

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