Random access memory is a type of computer data storage space. Today it takes the form of included circuits that allow the stored data to be accessed in any order, i.e. at random. The word random thus refers to the detail that any piece of data can be returned in a constant time, despite of its physical location and whether or not it is related to the earlier piece of data.
This contrasts with storage mechanisms such as tapes, charismatic discs and optical discs, which rely on the physical movement of the recording medium or a reading head. In these devices, the movement takes longer than the data transfer, and the rescue time varies depending on the physical location of the next item.
The word RAM is mostly associated with explosive types of memory (such as DRAM memory modules), where the information is lost after the power is switched off. However, many other types of memory are RAM as well, including most types of ROM and a type of flash memory called NOR-Flash.
This contrasts with storage mechanisms such as tapes, charismatic discs and optical discs, which rely on the physical movement of the recording medium or a reading head. In these devices, the movement takes longer than the data transfer, and the rescue time varies depending on the physical location of the next item.
The word RAM is mostly associated with explosive types of memory (such as DRAM memory modules), where the information is lost after the power is switched off. However, many other types of memory are RAM as well, including most types of ROM and a type of flash memory called NOR-Flash.
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