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perhaps you mean ROM, but your question is unclear. not all computers have ROM. some ROM is indeed writable (e.g. PROM, UVPROM, EPROM, EEPROM, Flash ROM), but writing is much slower than reading and often requires nonstandard voltages not normally available in the operating computer. early ROM technologies even required physical rewiring of their circuits to change their contents... but it could be changed.

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10y ago
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8y ago

RAM is often referred as Primary memory which can read but can't write on computer.

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Wiki User

12y ago

It is the ROM.

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Wiki User

13y ago

flash drive

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Q: I have good memory i can read but i can't write?
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