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I.t Assignment by:

Adnan pervez28th of july 2012.

Registration number:1511212003

Submitted to:

sir abrahim

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Read only disk (CD-ROM):

In PC the most commonly used opticalstorage technology is Compact Disk Read-Only Memory(CD-ROM).

A standard CD-ROM disk can store up to650 MB of data, or about 70 minutes ofaudio.

CD-ROM drives can now transfer dataup to speed of 7800 KBps. Data transfer

speeds are getting faster.

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magnetic

tape storage

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Thank u for your

consideration