“CD-ROM”的概念、定义、翻译、参考文献-科学参考

CD-ROM

Physics

CD read-only memory: a device that is based on the audio compact disk and provides read-only access to a large amount of data (up to 700 megabytes) for use on computer systems. A CD-ROM drive must be used with the computer system to read the data from disk; the data cannot normally be rewritten. Most drives can also play CD audio disks, but audio disk players cannot handle CD-ROMs. The data may be in any form—text, sound, images, or binary data, or a mixture—and various CD-ROM format standards exist to handle these. CD-ROMs were widely used for the distribution of data, images, and software, and for archiving data but have now been superseded almost entirely by DVDs.

Computer

CD read-only memory, a means of providing read-only access to data for use on computer systems; the term applies to the medium in general (based on the 120 mm diameter audio CD) and to a particular instance.
A CD-ROM drive must be used with the computer system to read the information from disk. Most drives can also play CD audio disks, but audio disk players cannot handle CD-ROMs. A standard CD-ROM is capable of holding about 700 Mbytes of data. The first CD-ROM drives moved the disk at the same speed as the audio product, both using CLV, and had a much lower rate—about 150 Kbytes per second—than hard magnetic disks (although higher than floppy disks). Modern drives operate at about 50 times this speed, giving data transfer rates of 7.5 Mbytes per second.
The data on CD-ROMs is encoded in the form of a spiral of minute pits impressed into one surface of the disk at the time of manufacture, and cannot normally be rewritten (but see CD-R, CD-RW). The data may be in any form—text, sound, static or video images, or binary data, or a mixture (see multimedia); various CD-ROM format standards exist to handle these.
CD-ROM is widely used for the distribution of data, images, and software. Many commercial databases and indexes are available on CD-ROM, often as an alternative to an online service. It has now been almost completely superseded by the DVD as dataset sizes increase.
CD-ROM was first announced in 1983 and became a mass-market medium in the mid-1990s.

Electronics and Electrical Engineering

A compact disc that is used for the storage of digital information in a manner similar to ROM in that it can be written to only once but the information is retained permanently. The information is read from disc by means of a CD-ROM drive in a computer system (an audio CD player cannot handle CD-ROMs). The stored information may represent text, sound, still or video images, or a mixture of these. CD-ROMs are also used for the distribution of data, images, and software. They have now been superseded almost entirely by DVDs, which can hold much more data.

单词	CD-ROM
释义	CD-ROM Physics CD read-only memory: a device that is based on the audio compact disk and provides read-only access to a large amount of data (up to 700 megabytes) for use on computer systems. A CD-ROM drive must be used with the computer system to read the data from disk; the data cannot normally be rewritten. Most drives can also play CD audio disks, but audio disk players cannot handle CD-ROMs. The data may be in any form—text, sound, images, or binary data, or a mixture—and various CD-ROM format standards exist to handle these. CD-ROMs were widely used for the distribution of data, images, and software, and for archiving data but have now been superseded almost entirely by DVDs. Computer CD read-only memory, a means of providing read-only access to data for use on computer systems; the term applies to the medium in general (based on the 120 mm diameter audio CD) and to a particular instance. A CD-ROM drive must be used with the computer system to read the information from disk. Most drives can also play CD audio disks, but audio disk players cannot handle CD-ROMs. A standard CD-ROM is capable of holding about 700 Mbytes of data. The first CD-ROM drives moved the disk at the same speed as the audio product, both using CLV, and had a much lower rate—about 150 Kbytes per second—than hard magnetic disks (although higher than floppy disks). Modern drives operate at about 50 times this speed, giving data transfer rates of 7.5 Mbytes per second. The data on CD-ROMs is encoded in the form of a spiral of minute pits impressed into one surface of the disk at the time of manufacture, and cannot normally be rewritten (but see CD-R, CD-RW). The data may be in any form—text, sound, static or video images, or binary data, or a mixture (see multimedia); various CD-ROM format standards exist to handle these. CD-ROM is widely used for the distribution of data, images, and software. Many commercial databases and indexes are available on CD-ROM, often as an alternative to an online service. It has now been almost completely superseded by the DVD as dataset sizes increase. CD-ROM was first announced in 1983 and became a mass-market medium in the mid-1990s. Electronics and Electrical Engineering A compact disc that is used for the storage of digital information in a manner similar to ROM in that it can be written to only once but the information is retained permanently. The information is read from disc by means of a CD-ROM drive in a computer system (an audio CD player cannot handle CD-ROMs). The stored information may represent text, sound, still or video images, or a mixture of these. CD-ROMs are also used for the distribution of data, images, and software. They have now been superseded almost entirely by DVDs, which can hold much more data.
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