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This article is about what ROM stands for. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

ROM represents read-only memory and CD represents CD-ROM, so CD-ROM should be read-only CD-ROM, an external storage medium that can store a large amount of data.

CD-ROM, which is used in microcomputer systems with multimedia function, is a kind of "CD-ROM".

CD-ROM (Compact Disc Read-Only Memory) is a CD-ROM used on a computer. This kind of disc can only write data once, and the information will be permanently stored on the disc and read out through the disc drive when in use. The CD format was originally designed for music storage and playback. In 1985, the yellow book standard developed by SONY and Philips made the format suitable for a variety of binary data. Some CD-ROM stores both music and computer data. This kind of CD-ROM music can be played by CD players, and computer data can only be processed by computers.

CD-ROM, optical disc read-only memory, is an external storage medium capable of storing large amounts of data. A compressed optical disc is about 4.5in in diameter and 8in thick, and can hold about 660 megabytes of data. All CD-ROM disks are pressed from a master disk and then packaged in a polycarbonate protective shell. The data recorded on the master disk is in the shape of a spiral, scattered outward from the center, and there are many tiny pits on the disk surface, which is the recorded digital information. When reading the data on CD-ROM, the laser beam is used to scan the optical disc, and the digital information is obtained according to the reflection change of the laser on the pit. The information in the disk is stored in a spiral light path.

The speed of the CD-ROM drive is expressed as "X times the speed". The standard speed is 2 times the speed, 4 times the speed, 8 times the speed and so on. At present, it can reach 50 times the speed. With the development of technology, there has been a digital multi-function disk (DVD), which has a larger storage capacity, which has reached 9.4 gigabytes, and has higher image definition and higher fidelity.

CD-ROM is the optical disc specification used by the computer. The device for reading the optical disc is called the CD-ROM. The data stored on the optical disk is read by laser light, not in a magnetic way, so the optical disc can be preserved for decades. The format of the CD used by the computer is the same as that of the music disc (CD) played by the CD in the ordinary home. The data capacity of a CD is as high as 650MB (74 min), and there are about 450 1.44MB floppy discs. Generally, floppy disks are erasable, but optical discs can only read data, but cannot write data (if there is a CD-R burnable optical drive and CD-R blank disk plus burning writing software, you can write data on the optical disk). At present, most computers list CD-ROM as standard equipment, and the speed of CD-ROM is from 1 times, 2 times. 24 times, 32 times, to 40 times the fastest today. The speed of generations is very fast, and the optical disk used in the computer system is also known as CD-Title.

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