Stands for “Compact Disc Read Only Memory” is a device which is used to read out the data from storage devices such cd, DVD etc.

They are already built in computers during the manufacturing process to read and run the available data on the cd. A button on cd-rom is pressed to insert and eject the cd. Several formats are used for data stored on compact discs, known as the Rainbow Books.

The Yellow Book, published in 1988,[4] defines the specifications for CD-ROMs, standardized in 1989 as the ISO/IEC 10149 / ECMA-130 standard. The CD-ROM standard builds on top of the original Red Book CD-DA standard for CD audio. Other standards, such as the White Book for Video CDs, further define formats based on the CD-ROM specifications.

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The computer mouse as we know it today was invented and developed by Douglas Engelbart, with the assistance of Bill English, during the 1960’s and was patented on November 17, 1970