Robert Crawford, MBA West Middle School

 Describe what an operating system does.  Summarize why compatibility is an issue for computer users.  Explain what utility software does.  Identify four different types of application software and way s to obtain them.

 Application Software  Operating System (OS)  Software  System Software  Utility Software

 Remember, last week we discussed hardware, ◦ the physical pieces that make up the computer.

 Remember, last week we discussed hardware, ◦ the physical pieces that make up the computer.  Software includes all of the programs that tell a computer what to do and how to do it.

 Software is divided into two main categories. ◦ System Software ◦ Application software

 Software is divided into two main categories. ◦ System Software  Programs that are needed for the computer to work properly ◦ Application software

 Software is divided into two main categories. ◦ System Software ◦ Application software  Programs that are designed to help you perform tasks

 System software is also divided into two major categories: ◦ Operating Systems ◦ System utilities

 System software is also divided into two major categories: ◦ Operating Systems  In its simplest definition, the operating system is the layer of software that exists between the applications and the hardware.  However this doesn’t tell us much ◦ System utilities

 Operating Systems ◦ The operating system actually performs a lot of different tasks. ◦ So, instead of defining it as what it is, let's define it by what it does

 Operating Systems ◦ The operating system lets the hardware devices communicate with one another. ◦ It supports the hardware when applications programs are running

 Operating Systems ◦ The operating system lets the hardware devices communicate with one another. ◦ It supports the hardware when applications programs are running ◦ The most widely used OS’s are  Microsoft Windows  UNIX  Apple OSx  Linux

 System software is also divided into two major categories: ◦ Operating Systems ◦ System utilities

 System utilities ◦ These are programs that help the computer work properly.  Maintenance and repair that the OS does not do by itself  Repairing damaged files  Compressing files

 Software is divided into two main categories. ◦ System Software ◦ Application software

 The application software consists of the programs you run on the computer.

 There are four main categories of application software. ◦ Productivity ◦ Graphics ◦ Communication ◦ Home, Education, and Entertainment

 There are four main categories of application software. ◦ Productivity  These are the programs people use to be more productive at work.  Word processors  Spreadsheets  Databases  Etc.

 There are four main categories of application software. ◦ Graphics  These are programs that make it possible to draw, paint, and touch-up photos

 There are four main categories of application software. ◦ Communication  These are the programs used to:  Connect to the internet  Send

 There are four main categories of application software. ◦ Home, Education, and Entertainment  This is a broad category that includes:  Games  Tax Preparation  General learning

 Remember, There are four main categories of application software. ◦ Productivity ◦ Graphics ◦ Communication ◦ Home, Education, and Entertainment

 There are two ways to obtain application software: ◦ Custom ◦ Off-the Shelf

 There are two ways to obtain application software: ◦ Custom ◦ Off-the Shelf ◦ Both have advantages and disadvantages

 Function of an operating system  Function of utility software  Four types of application software  Two ways to obtain software ◦ An advantage and disadvantage of each method

 Key terms ◦ Application Software ◦ Operating System (OS) ◦ Software ◦ System Software ◦ Utility Software