Definition: A reiterator is a type of software or hardware device that is used to read and write data from/to memory. It can be used in various applications such as computer programming, file management, and system monitoring. Reiters are typically found on computers with RAM (Random Access Memory) which allows them to read and write data directly into the RAM, rather than through a hard disk or other external storage device. This makes it easier for users to control and monitor their memory usage. Reiter devices