EEPROM

EEPROM which stands for Electrically Erasable Programmable Read-Only Memory is a type of non-volatile memory used in computers and other electronic devices to store small amounts of data that must be saved when power is removed. When larger amounts of static data are to be stored a specific type of EEPROM such as flash memory is more economical than traditional EEPROM devices.

OPERATING SYSTEM

EPROM

An EPROM, or Erasable Programmable Read-Only Memory, is a type of memory chip that retains its data when its power supply is switched off. In other words, it is non-volatile. It is an array of floating-gate transistors individually programmed by an electronic device that supplies higher voltages than those normally used in digital circuits. Once programmed, an EPROM can be erased only by exposing it to strong ultraviolet light

OPERATING SYSTEM

PROM

A programmable read-only memory is a form of digital memory where the setting of each bit is locked by a fuse or anti fuse. Such PROMs are used to store programs permanently.