instruction set architecture أمثلة على

• The range of virtual addresses usually starts at a low address and can extend to the highest address allowed by the computer's instruction set architecture and supported by the operating system's pointer size implementation, which can be 4 bytes for 32-bit or 8 bytes for 64-bit OS versions.
  بت او 8 بايت لنظام التشغيل 64 - بت .