overview of computer system

• computer - an electronic device that can be programmed to accept data, process and generate result
• computer along with additional hardware and software is called computer system
• user -> input -> software application -> operating system -> output
• logical unit - <, >, <=, >=, ==, !=
• translator - convert source code into machine code, convert code from programming language into machine code that can be executed by computer
• type of translator - compiler, assembler, interpreter
• compiler - translate high level instruction into object code, example: python compiler, java compiler, translate all at once
• interpreter - translate high level instruction into machine understandable, example: python, java, translate line by line
• assembler - translate low level instruction into machine understandable , example: MASM (microsoft marco assembler), TASM (turbo assembler)
• computer architecture - a principle describing how hardware and software connect to make them function
• computer is used for general purpose; system is used for specific purpose
• C (common), o (operating), m (machine), P (particularly), u (use for), t (trade), e (electronic), r (research)
• types of computer architecture - john von-nuemann architecture, harvard - modified architecture