RAM, ROM, and Flash Memory

A good explaination about RAM, ROM and Flash is given http://eu.dummies.com/how-to/content/ram-rom-and-flash-memory.html . A exmplaination with more detail is given at
http://www.escotal.com/memory.html.

RAM: Stands for random access memory; refers to memory that the microprocessor can read from and write to. When you create something in memory, it’s done in RAM. RAM is memory and vice versa.

ROM: Stands for read-only memory. The microprocessor can read from ROM, but it can’t write to it or modify it. ROM is permanent. Often, ROM chips contain special instructions for the computer — important stuff that never changes. The microprocessor can access information stored on a ROM chip whenever it needs to. The instructions are always there because they’re not erasable.

Flash: A special type of memory that works like both RAM and ROM. You can write information to flash memory, like you can with RAM, but that information isn’t erased when the power is off, like it is with RAM.


Reference:

• http://eu.dummies.com/how-to/content/ram-rom-and-flash-memory.html
• http://www.escotal.com/memory.html