Memory is like the banks of switches we have been thinking about that simply contain 1/0 binary patterns. Read Only Memory (abbreviated ROM) is a special kind of memory that cannot be changed. The most basic instructions for the CPU are built in to the ROM at the factory. To the end user, there really is very little to worry about regarding ROM. The amount of ROM in your computer doesn't really matter to you. All your programs and information will go into another kind of memory that we will learn about soon.