4 Major Parts of a Computer
...r. There are many different speeds of processors, but I can’t name all of them. Memory is the electronic holding place for instructions and data that your computer's microprocessor can reach quickly. Memory is often referred to as random access memory (RAM). The RAM accesses instructions and data from the more slowly accessed hard disk form of storage. There are four sections of memory, external memory, high memory area, upper memory area and conventional memory. External memory (XMS) is directly accessible memory starting at 1 MB. High memory area (HMA) is the first 64 KB of XMS, the extended memory above the first 1MB of memory. Upper memory area (UMA) is located between 640KB and 1MB. Upper Memory Block (UMB) is areas of upper memory that is remapped into RAM. Conventional memory portion of the RAM is the only p...