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Software vs Hardware

2017-01-06 Jerrell GardnerComputers

Abstraction - Interpret or translate high-level operations into simple computer instructions

[caption id=“attachment_300” align=“aligncenter” width=“459”]screen-shot-2017-01-06-at-11-00-04-am Hardware and software as hierarchical views[/caption]

Types of System Software:

  1. Operating System - Supervising program manages the resources of a computer for the benefit of the programs that run on that computer
  2. Compiler - A program that translates high-level language statements into assembly language statements
  3. Assembler - A program that translates a symbolic version of instructions into the binary version

In order to communicate to hardware, you need to send electrical signals to it. The signals are categorized by on _and _off or 1 and 0. Moreover, hardware has a two letter alphabet with each letter as a binary digit or bit. Using bits for both instructions and data is a foundation of computing!

Even though hardware speaks in binary, humans do not which creates a barrier between programmers and their hardware. As a result, an assembler was introduced to translate machine instructions to binary.

[caption id=“attachment_332” align=“aligncenter” width=“319”]screen-shot-2017-01-06-at-11-42-50-am High-level to machine language[/caption]

High-level Language vs. Machine Language?

  1. More natural language
  2. Improved programmer productivity
  3. Allows programs to be independent of the computer
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