Read–write memory

For read-write file system permissions, see file system permissions.

Read-write memory is a type of computer memory that may be relatively easily written to as well as read from (unlike ROM or "read-only memory"). The term RAM is often used to describe writable memory. RAM (or "random access memory") actually refers to memory that can access any memory ___location in a constant amount of time.

The term might also refer to memory locations having both read and write permissions. In computer systems using memory segmentation, each segment has a length and set of permissions (for example, read, write, execute) associated with it.