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Back Schreibschutz German Protección contra escritura Spanish Kirjutuskaitse Estonian Protezione da scrittura Italian 쓰기 보호 Korean Schrijfbescherming Dutch 防寫入保護 Chinese

IBM tape reel with white write ring in place, and an extra yellow ring.

From top to bottom: an unprotected Type I cassette, an unprotected Type II, an unprotected Type IV, and a protected Type IV.

A sheet of 5+1⁄4" floppy disk write protect tabs.

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Write protection is any physical mechanism that prevents writing, modifying, or erasing data on a device. Most commercial software, audio and video on writeable media is write-protected when distributed.

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