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2. 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.)

3. Random-access memory - Wikipedia

   en.wikipedia.org/wiki/Random-access_memory

   A 64 bit memory chip die, the SP95 Phase 2 buffer memory produced at IBM mid-1960s, versus memory core iron rings 8GB DDR3 RAM stick with a white heatsink. Random-access memory (RAM; / r æ m /) is a form of electronic computer memory that can be read and changed in any order, typically used to store working data and machine code.

4. LPDDR - Wikipedia

   en.wikipedia.org/wiki/LPDDR

   Low-Power Double Data Rate (LPDDR), also known as LPDDR SDRAM, is a type of synchronous dynamic random-access memory (SDRAM) that consumes less power than other random access memory designs and is thus targeted for mobile computing devices such as laptop computers and smartphones. Older variants are also known as Mobile DDR, and abbreviated as ...

5. History of hard disk drives - Wikipedia

   en.wikipedia.org/wiki/History_of_hard_disk_drives

   It was announced in 1956 with the then new IBM 305 RAMAC computer. [8] A variant, the IBM 355 Disk File, was simultaneously announced with the IBM RAM 650 computer, [9] an enhancement to the IBM 650. The IBM 350 drive had fifty 24-inch (0.6 m) platters, with a total capacity of five million 6-bit characters (3.75 megabytes). [10]

6. Density (computer storage) - Wikipedia

   en.wikipedia.org/wiki/Density_(computer_storage)

   The lower limit on this process is about $1 per completed chip due to packaging and other costs. [16] The relationship between information density and cost per bit can be illustrated as follows: a memory chip that is half the physical size means that twice as many units can be produced on the same wafer, thus halving the price of each one.

7. Computer data storage - Wikipedia

   en.wikipedia.org/wiki/Computer_data_storage

   A 1 GiB module of laptop DDR2 RAM. Storage technologies at all levels of the storage hierarchy can be differentiated by evaluating certain core characteristics as well as measuring characteristics specific to a particular implementation. These core characteristics are volatility, mutability, accessibility, and addressability.