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  The 8088 is the 16-bit microprocessor that controls the standard IBM
  personal computers, including the original PC, the PC/XT, the Portable PC,
  and the PCjr. Almost every bit of data that enters or leaves the computer
  passes through the CPU to be processed.

  Inside the 8088, 14 registers provide a working area for data transfer and
  processing. These internal registers, forming an area 28 bytes in size,
  are able to temporarily store data, memory addresses, instruction
  pointers, and status and control flags. Through these registers, the 8088
  can access 1 MB (megabyte), or more than one million bytes, of memory.