What is the difference between cd rom and worm

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Get the Answers App. They are popular for software and other multimedia applications. There are many categories of memories : primary and secondary memory. The processing capacity of computer not only depends on processor, but also on capacity of primary memory. Short for read-only memory, ROM is a storage medium that is used with computers and other electronic devices.

Unlike RAM random access memory , ROM is non-volatile, which means it keeps its contents regardless of whether or not it has power. A hard disk drive HDD , hard disk , hard drive, or fixed disk is an electro-mechanical data storage device that uses magnetic storage to store and retrieve digital data using one or more rigid rapidly rotating platters coated with magnetic material. Stands for "Compact Disc Recordable.

The word "recordable" is used because CD -Rs are often used to record audio, which can be played back by most CD players. The CD drive shines a laser at the surface of the CD and can detect the reflective areas and the bumps by the amount of laser light they reflect. The drive converts the reflections into 1s and 0s to read digital data from the disc. A CD - R disc needs to allow the drive to write data onto the disc.

In computer storage media, WORM write once, read many is a data storage technology that allows information to be written to a disc a single time and prevents the drive from erasing the data.

A type of optical media, WORM devices were developed in the late s and have been adapted to a number of different media. After that, the data is permanent and can be read any number of times. Category: technology and computing data storage and warehousing. They can only be read after they are finalized and any data that have been burned cannot be deleted.

Data is stored in a special dye layer and then burned with laser creating pits and lands that can be read by a CD drive and converted into digital 1s and 0s. It is suited for small runs of CDs which only require quick turns. CDRs have a limited lifespan; the dye can degrade after a few years making data unreadable. It is read only and is suitable for large runs. CD ROMs cannot be written on and cannot be burned.

They are being used to distribute computer software, games, and multimedia applications. Software distributors especially those of computer games employ copy protection schemes to limit the running of their software to the original CD Rom only.

Summary 1. Both can be read using any digital device but Compact Disc Readable is suited for small runs while Compact Disc Read Only Memory is suitable for large runs.