What is the difference between ram and rom?

ROM and RAM ROM (read-only memory) is a type of memory that can only be read, not written to. This makes it ideal for storing data that does not need to be changed, such as the operating system or firmware. ROM is also non-volatile, meaning that it retains its data even when the power is turned off. RAM (random access memory) is a type of memory that can be both read from and written to. This makes it ideal for storing data that needs to be changed frequently, such as the contents of a document or the state of a program. RAM is volatile, meaning that it loses its data when the power is turned off. The main difference between ROM and RAM is that ROM can only be read, while RAM can be both read from and written to. ROM is also non-volatile, while RAM is volatile. ROM is often used to store the operating system and firmware of a computer, while RAM is used to store the contents of documents and the state of programs.