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2. Random-access memory - Wikipedia

   en.wikipedia.org/wiki/Random-access_memory

   Most modern operating systems employ a method of extending RAM capacity, known as "virtual memory". A portion of the computer's hard drive is set aside for a paging file or a scratch partition, and the combination of physical RAM and the paging file form the system's total memory. (For example, if a computer has 2 GB (1024 3 B) of RAM and a 1 ...

3. Computer data storage - Wikipedia

   en.wikipedia.org/wiki/Computer_data_storage

   Operating systems borrow RAM capacity for caching so long as it's not needed by running software. [3] Spare memory can be utilized as RAM drive for temporary high-speed data storage. As shown in the diagram, traditionally there are two more sub-layers of the primary storage, besides main large-capacity RAM:

4. Computer memory - Wikipedia

   en.wikipedia.org/wiki/Computer_memory

   Historical lowest retail price of computer memory and storage Electromechanical memory used in the IBM 602, an early punch multiplying calculator Detail of the back of a section of ENIAC, showing vacuum tubes Williams tube used as memory in the IAS computer c. 1951 8 GB microSDHC card on top of 8 bytes of magnetic-core memory (1 core is 1 bit.)

5. Static random-access memory - Wikipedia

   en.wikipedia.org/wiki/Static_random-access_memory

   In April 1969, Intel Inc. introduced its first product, Intel 3101, a SRAM memory chip intended to replace bulky magnetic-core memory modules; Its capacity was 64 bits [a] [7] and was based on bipolar junction transistors. [8] It was designed by using rubylith. [9]

6. Orders of magnitude (data) - Wikipedia

   en.wikipedia.org/wiki/Orders_of_magnitude_(data)

   1,024 bits (128 bytes) - RAM capacity of the Atari 2600: 1,288 bits (161 bytes) – approximate maximum capacity of a standard magnetic stripe card: 2 11: 2,048 bits (256 bytes) – RAM capacity of the stock Altair 8800: 2 12: 4,096 bits (512 bytes) – typical sector size, and minimum space allocation unit on computer storage volumes, with ...

7. Memory cell (computing) - Wikipedia

   en.wikipedia.org/wiki/Memory_cell_(computing)

   Computer memory used in most contemporary computer systems is built mainly out of DRAM cells; since the layout is much smaller than SRAM, it can be more densely packed yielding cheaper memory with greater capacity. Since the DRAM memory cell stores its value as the charge of a capacitor, and there are current leakage issues, its value must be ...