Secondry memory - It doesn't lose its data, Primary memory - This is also call as main memory, Read only memory - Whay is the full form of rom, Nibble - 4 bytes is, Pen drive - Tumb size, Floppy desk - Now this is not use as disk, Qr code - -----can be scanned, Biometric readers - ----------can identify a person, Impact printers - With striking of hammers or pins on ribbon, Non -impact printers - Spray or laser(printer),

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