Information systems are combinations of hardware, software, and telecommunications networks that people build and use to collect, create, and distribute useful data, typically in organizational settings. In our modern life information system is must necessary. We can pass a day without this. Technology can be thought of as the application of scientific knowledge for practical purposes. From the invention of the wheel to the harnessing of electricity for artificial lighting, technology is a part of our lives in so many ways that we tend to take it for granted.
Information System consists of five parts.
- Hardware (Equipment that processes the data to create information)
- Software (Step-by-step instructions that convert data into information)
- Data (unprocessed facts)
- Procedures (Rules or guidelines to follow when using Hardware and software)
- People (End user who is the most important part of IS)
The computer based information system is developed by the people and for the people. Computer users are people who will use the computer system. The developers are the people, who will develop the system on basis of requirement.Data is a collection of raw facts and figures. There are several ways the organize data e.g. Data Base Management System, File Management System. A computer based information system is used to process data into information.Procedures are the actions that are used by the people to process the data into information. Operating procedures are used to operate the computer, Data entry, Communication, Maintenance, Back up and error recovery. Emergency procedures are used to trouble shoot.Different types of Hardware used for Computer Based Information System. Input hardware (Keyboard, mouse, etc.), Processing hardware (Processor, Memory, etc), Output hardware (Monitor, printer, etc) and Storage hardware (Disk drive, etc).Different types of software used in CBIS. Application software includes Word processing, electronic spreadsheets, graphical packages and databases. System software includes operation systems and communication software.The components works together to form a computer based information system.
Lets talk details about the five parts of Information System:
1. HARDWARE: Information systems hardware is the part of an information system that can touch – the physical components of the technology. Computers, keyboards, disk drives, iPads, and flash drives are all examples of information systems hardware.
2. SOFTWARE: 
Software is a set of instructions that tells the hardware what to do. Software is not tangible – it cannot be touched. When programmers create software programs, what they are really doing is simply typing out lists of instructions that tell the hardware what to do. There are several categories of software, with the two main categories being operating-system software, which makes the hardware usable, and application software, which does something useful. Examples of operating systems include Microsoft Windows on a personal computer and Google’s Android on a mobile phone. Examples of application software are Microsoft Excel and Angry Birds.
3. DATA: The third component is data. We can think of data as a collection of facts. For example, the street address, the city we live in, and our phone number are all pieces of data. Like software, data is also intangible. By themselves, pieces of data are not really very useful. But aggregated, indexed, and organized together into a database, data can become a powerful tool for businesses. In fact, all of the definitions presented at the beginning of this chapter focused on how information systems manage data. Organizations collect all kinds of data and use it to make decisions. These decisions can then be analyzed as to their effectiveness and the organization can be improved.
4. PROCEDURES: Procedures are the policies that govern the operation of a computer system. “Procedures are to people what software is to hardware” is a common analogy that is used to illustrate the role of procedures in a CBIS.
5. PEOPLE: When thinking about information systems, it is easy to get focused on the technology components and forget that we must look beyond these tools to fully understand how they integrate into an organization. A focus on the people involved in information systems is the next step. From the front-line help-desk workers, to systems analysts, to programmers, all the way up to the chief information officer (CIO), the people involved with information systems are an essential element that must not be overlooked.
Tazin 
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