How is data stored electronically and by what method?

Definitions of storage: The number of instructions and amount of data a computer can store in its memory is measured in bytes. One byte contains 8 bits (short for binary digits, 0 and 1). Computers work by using pulses of voltage which represent either 0 or 1. Low voltages represent 0, high voltages represent 1. 8 bits are normally needed to store one character. A single character can be stored in one byte. We normally refer to storage capacities in terms of kilobytes (…showed first 75 words of 759 total…

…showed last 75 words of 759 total…CD-ROM drives: CD-ROM drives use the same technology as music CDs and CD players. The data is stored on the disk digitally and a laser beam is used to read the data off the disk. CD-ROMs can be filled with clip art, encyclopaedias, photographs, and all sorts of reference material. CD-ROMs are read-only disks, which mean that you can read the data off the disk but not store new data or alter the existing data.