random access memory - RAM = Random Access Memory - each apartment has its own address. Address set

The computer stores data and programs in memory. There are several criteria to us in connection with memories interest. Memory function on your computer: system memory - used to memorizing immediately execute machine vertaal code and data, which is currently under construction. Has to be fast, must be able to read and write data. OP is always RAM organization. buffers - serve as a temporary recorder for data or instructions transmitted between the processor and the IP, or the I / O device and a slower peripheral device (disk cache). Have a size from a few KB to several MB, RAM organization, the opportunity to read and write and access time of less than OP. External memory - used to store data and programs to be stored on this computer. Data to external memory are stored in contiguous, large files, we read and writes each as a whole, therefore, may be of SAM.
While the OP is only "temporary" work, that may not have a permanent record, the external memory require that a record is kept on this computer. Meets the diverse requirements of the different technical solutions. While the OP and cache memory are implemented electronically, the criteria for external memory best meet the magnetic and magneto-optical disks. Comparison vertaal of memory access times:
random access memory - RAM = Random Access Memory - each apartment has its own address. Address setting vertaal can immediately make any statement regardless of the order in which they were stored. Such action is advantageous vertaal when working with fragmented, discontinuous data - OP
associative memory - = CAM Content Addressable Memory - is also random access memory. Records vertaal in it, however, made available vertaal to the address given, but giving properties of stored data (usually some kind of binary code, which contain a search alert). Especially this kind of systems used in artificial intelligence, information and sorting machines Depending vertaal on whether it is read-only memory, or even write: RWM (Read-Write Memory) ROM (Read-Only Memory) According to physical vertaal principle: Electrical vertaal Engineer - punch cards, magnetic tape - disks, magnetic tape, optical disk ... - CD, holographic semiconductor vertaal memory parameters:
Access Time - indicates the time that elapses from the award of the requirement to obtain the data to the beginning of actual reading. [Ns] Capacity vertaal - indicates how much information can be stored in memory [B, KB, MB, GB] The physical organization of memory
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