Programmable read-only memory, shortly pronounced as PROM is one kind memory that holds the data written on it permanently. In this type of memory, data can be written for only one time. However, there is a significant difference between a RAM and PROM. The RAM can hold the data when the computer is turned on, but the information containing on a PROM remains there even after the computer is turned off.
Another difference between PROM and ROM is, during the manufacturing procedure, the ROM is programmed by the manufacturers, while PROM is designed as a blank memory and a user can write data on it by the help of a PROM burner.
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