info tech chapter 3

• Personal Computer (PC) is a digital device designed for personal purposes, such as working, studying, gaming, and browsing the internet.
• Hardware refers to the external and internal devices and equipment that enable you to perform major functions such as input, output, storage, communication, processing, and more.
• Two Types Of Computer Hardware:

  1. External

  2. Internal
• Categories Of Hardware

  Input Devices

  Storage Devices

  Central Processing Unit

  Output Devices
• Input Devices

  • Do the task of accepting the data and storing them in the computer ’s memory and or the storage devices.
• Input Devices

  • encoding data or information
• Storage Devices

  • store all information
• Two Forms of Storage:

  • random access memory
  • secondary storage devices
• Random Access Memory - main memory of computer
• Secondary Storage Devices - removable storage disk
• Central Processing Unit

  • simply as the central processor. 
  • It is considered as the brain of a computer.
  • Handles the task of processing of data using the microprocessors built into the computer.
• Output Devices

  • send data from computer to another devices
• Output Devices

  • Enable the presentation of display of the results after having processed the data encoded or stored in the computer.
• Software

  • refers to a computer program;
  • Consists of instructions that tell the computer how to carry out a particular task
  • Contains sets of instructions that manage the hardware;
  • Computer won’t work properly unless it is properly programmed
• Categories of Software

  1. System software

  2. Application software

  3. Software development
• System Software

  • Also called as Operating system or OS
• System Software

  • Set of software that manages the computer system hardware and  controls computer resources.
• Application Software

  • Performs specific data or text processing functions. examples are word processing and online shopping apps.
• Two Types of Application System

  • back end applications
  • front end applications
• Back End Applications - Refers to software considered on the supply side of the business or those sets of software used in conjunction with the production side of the business
• Front End Applications - those meant for processes or application on the distribution or postproduction side of the business or one that is considered related to the customer side of the business.
• Software Development

  • Process of computer programming, documenting, testing, and bug fixing involved in creating and maintaining applications and frameworks resulting in a software product.