computer systems

computer systems

1. CPU the computer brain

   • Central processing unit
   • secondary storage
     • processor
       • input devices
       • output devices
       • cache memory
         • main memory
   • fetch-decode-execute

2. Definition of: computer system. computer system. The complete computer made up of the CPU, memory and related electronics (main cabinet), all the peripheral devices connected to it and its operating system. Computer systems fall into two categories: clients and servers.

3. An instruction cycle (sometimes called a fetch–decode–execute cycle) is the basic operational process of a computer. It is the process by which a computer retrieves a program instruction from its memory, determines what actions the instruction dictates, and carries out those actions.

4. Von Neumann Architecture

   • The von Neumann architecture, which is also known as the von Neumann model and Princeton architecture, is a computer architecture based on that described in 1945 by the mathematician and physicist John von Neumann and others in the First Draft of a Report on the EDVAC.