How data is stored in optical storage ?

How data is stored in optical storage? The bits ( 0 and 1) are encoded as transitions between raised ridges (reflective area) and etched pits, which are lined up in a spiral like pattern....

What are Input devices for PDAs, Smart Phones and Tablet PCs

What are Input devices for PDAs, Smart Phones and Tablet PCs ?Ans. A Primary Input device for a PDA is a basic stylus. Some PDAs have a built in keyboard or support voice input. You...

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