Program (Software) consists of a series of related instructions, organized for a common purpose, that tells the computer what tasks to perform and how to perform them. Two categories of software are system software and application software.
*System software - consists of the programs that control or maintain the operations of the computer and its devices. Operating systems are a widely recognized example of system software.
*System software - consists of the programs that control or maintain the operations of the computer and its devices. Operating systems are a widely recognized example of system software.
Operating Systems
is a set of programs that coordinates all the activities among computer or mobile device hardware. It provides a means for users to communicate with the computer or mobile device and other software. Many of today’s computers and mobile devices use a version of Microsoft’s Windows, Apple’s Mac OS, Apple’s iOS, or Google’s Android . To use application software, your computer or mobile device must be running an operating system.
Applications
Application software, usually simply called an application(or app for short), consists of programs designed to make users more productive and/or assist them with personal tasks. Browsers, are an example of an application that enables users with an Internet connection to access and view webpages.
Desktop app - is used to describe applications stored on a computer.
Web app - is an application stored on a web server that you access through a browser.
Mobile app - is an application you download from a mobile device’s application store or other location on the Internet to a smartphone or other mobile device.
Desktop app - is used to describe applications stored on a computer.
Web app - is an application stored on a web server that you access through a browser.
Mobile app - is an application you download from a mobile device’s application store or other location on the Internet to a smartphone or other mobile device.
Categories of Applications
*Productivity - Create letters, reports, and other documents; Create visual aids for presentations; Organize appointments and contact lists; Balance checkbook, pay bills, and track income and expenses.
*Graphics and Media - Modify digital photos, i.e., crop, remove red-eye, etc.; Modify recorded movie clips, add music, etc.; View images, listen to audio/music, watch videos.
*Personal Interest - View maps, obtain route directions, locate points of interest; Look up material in dictionaries, encyclopedias, etc; Learn through tutors and prepare for tests; Receive entertainment news alerts, check movie times and reviews, play games.
*Communications - Access and view webpages; Send and receive messages; Speak to other users over the Internet; Transfer items to and from other computers on the Internet.
*Security - Protect a computer against viruses; Detect and protect against unauthorized intrusions; Detect and delete spyware, adware, and other malware.
*Graphics and Media - Modify digital photos, i.e., crop, remove red-eye, etc.; Modify recorded movie clips, add music, etc.; View images, listen to audio/music, watch videos.
*Personal Interest - View maps, obtain route directions, locate points of interest; Look up material in dictionaries, encyclopedias, etc; Learn through tutors and prepare for tests; Receive entertainment news alerts, check movie times and reviews, play games.
*Communications - Access and view webpages; Send and receive messages; Speak to other users over the Internet; Transfer items to and from other computers on the Internet.
*Security - Protect a computer against viruses; Detect and protect against unauthorized intrusions; Detect and delete spyware, adware, and other malware.
Installing and Running Applications
is the process of setting up software to work with a computer, printer, and other hardware. When you buy a computer, it usually has some software such as an operating system pre-installed on its hard disk so that you can use the computer the first time you turn it on. Installed operating systems often include other programs such as a browser, media player, and calculator. To use additional desktop apps on a computer, you usually need to install the software.
Once installed, you can run an application so that you can interact with it. When you instruct a computer or mobile device to run an application, the computer or mobile device loads its software, which means the application is copied from storage to memory. Once in memory, the computer or mobile device can carry out, or execute, the instructions in the application so that you can use it.
You interact with a program or application through its user interface. The user interface controls how you enter data and instructions and how information is displayed on the screen.
Once installed, you can run an application so that you can interact with it. When you instruct a computer or mobile device to run an application, the computer or mobile device loads its software, which means the application is copied from storage to memory. Once in memory, the computer or mobile device can carry out, or execute, the instructions in the application so that you can use it.
You interact with a program or application through its user interface. The user interface controls how you enter data and instructions and how information is displayed on the screen.
Install, Run, and Exit an Application
The following steps describe how to install, run, and exit an application on a computer.
Locate the Application to Install. Applications are available from retail stores, websites, and from other services such as Apple’s App Store or Google Play.
Download and/or Install the Application. If you are installing an application from physical media such as a CD or DVD, insert the media in your computer. If the application is available from a website or online store, download the application to your computer. If the installation does not start automatically, locate the installation program on the media and then double-tap or double-click the installation program.
Run the Application. You have various options for running an application: Tap or click the application’s tile or double-tap or double-click the application’s icon in the desktop; Display a list of all applications on your computer and then tap or click the icon representing the application to run (some computers may require you to double-tap or double-click the icon); Use the search feature in the operating system to locate the newly installed application and then tap or click the search result to run the application.
Exit the Application. Locate and tap or click an Exit or Close button or an Exit or Close command, which often can be found on an application’s File menu; Locate and tap or click the Close button on the application’s title bar (horizontal space at top of window)
Locate, Install, and Run a Mobile App
The following steps describe how to locate, install, and run an app on a mobile device:
1. Navigate to the online store for your device. Common stores used to obtain apps include Apple’s App Store and Google Play.
2. Use the search feature to browse for the type of app you would like to download and install. If the app is not free, follow the payment instructions.
3. Tap or click the appropriate button to download the desired app. Depending on your device, you may need to enter additional information, such as a password, to download the app. Once the app downloads, it should install automatically.
4. Locate the app’s icon on your device and then tap or click the icon to run the app. Depending on the app, you may have to create a profile, which contains personal data about a user, or enter your email address.
2. Use the search feature to browse for the type of app you would like to download and install. If the app is not free, follow the payment instructions.
3. Tap or click the appropriate button to download the desired app. Depending on your device, you may need to enter additional information, such as a password, to download the app. Once the app downloads, it should install automatically.
4. Locate the app’s icon on your device and then tap or click the icon to run the app. Depending on the app, you may have to create a profile, which contains personal data about a user, or enter your email address.
Developing Programs and Apps
![Picture](/uploads/8/7/1/4/87140180/payroll_orig.jpg)
A software developer, sometimes called an application developer or computer programmer, is someone who develops programs and apps or writes the instructions that direct the computer or mobile device to process data into information. When writing instructions, a developer must be sure the program or app works properly so that the computer or mobile device generates the desired results.
Software developers use a programming language or program development tool to create computer programs and apps. Popular programming languages include C++, Java, JavaScript, Visual C#, and Visual Basic. Figure 1-29 shows some of the Visual Basic instructions a programmer may write to create a simple payroll program
Software developers use a programming language or program development tool to create computer programs and apps. Popular programming languages include C++, Java, JavaScript, Visual C#, and Visual Basic. Figure 1-29 shows some of the Visual Basic instructions a programmer may write to create a simple payroll program
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