Random-access memory ( RAM ) is a form of computer memory that can be read and changed in any order, typically used to store working data and machine code . A random-access memory device allows data items to be read or written in almost the same amount of time irrespective of the physical location of data inside the memory. In contrast, with other direct-access data storage media such as hard disks , CD-RWs , DVD-RWs and the older magnetic tapes and drum memory , the time required to read and write data items varies significantly depending on their physical locations on the recording medium, due to mechanical limitations such as media rotation speeds and arm movement. RAM contains multiplexing and demultiplexing circuitry, to connect the data lines to the addressed storage for reading or writing the entry. Usually more than one bit of stora...
HTML 2 November 24, 1995 HTML 2.0 was published as RFC 1866. Supplemental RFCs added capabilities: November 25, 1995: RFC 1867 (form-based file upload) May 1996: RFC 1942 (tables) August 1996: RFC 1980 (client-side image maps) January 1997: RFC 2070 (internationalization)
Read-only memory ( ROM ) is a type of non-volatile memory used in computers and other electronic devices . Data stored in ROM cannot be electronically modified after the manufacture of the memory device . Read-only memory is useful for storing software that is rarely changed during the life of the system, also known as firmware . Software applications (like video games ) for programmable devices can be distributed as plug-in cartridges containing ROM .
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