Information Technologies System


Information systems refer to all the machines involved in the running of a business in a given period. These factors combined to provide information that ensures smooth business operations. These information systems can be grouped into the following five categories.

  • Decision support systems;
  • Expert systems;
  • Management information systems;
  • Transaction processing systems;
  • Office information systems.

Decision support systems

This system provides information that is helpful in the decision-making process of a business. The information it uses is not contained in the other information systems such as the management information or the transaction processing systems. It uses internal and external information. There are different types of decision support system that allow a user to create a model of the issues affecting the business decision. Using such a model and the projected results, it is easier to make that decision (O’Leary, 2008).

Expert systems

The expert system obtains and record knowledge from experts and uses these human decision-making processes to mimic them for use by less gifted personnel. It is made up of a knowledge base and inference rules and the use of the knowledge and human experience coupled with guided logical decisions, make them able to assist the user. The expert systems are useful for the varied nature of decision-making processes since they are not restricted (O’Leary, 2008).

Management information systems

MIS was developed from the transaction processing system, and it is used to provide timely, organized information utilized to solve challenges, coordinate activities, and decision making. It can be thought of as a reporting system because it produces reports. Its working is intertwined with the transaction processing system because it draws all its information from the transaction processing system. This system produces the detailed, summary, and exception information from data in the transaction processing system (Lindsay, 2000).

Transaction processing system

It captures records and manipulates the data resulting from the daily operations of a business. This system hastens data processing, reduces the cost of operation, and makes the handling of a large amount of data easier. They are of different types the batch processing system accumulates transactions and processes them as a group, and the online processing system processes one transaction at a time as they occur.

Decision structure and Information System.
Source: (O’Leary, 2008).

Office information system

OIS is used for effective workflow and ease of communication in a business premise; it uses computer networks, hardware, and software to achieve this. This system is also termed as office automation since all the office tasks are done electronically. This is used to send messages, distribute schedules, and other information effectively. This system is very useful in utilizing the various communication technologies for the benefit of the business (Lindsay, 2000).

1. Decision
Allows the partners to have real time interaction.
They assist the user in key decision making.
They store a large amount of data hence require large databases.
The analysis also demands looking into very old information to aid certain decisions
2. Expert
They can be useful in many kinds of decision making tasks. A faulty model results in a wrong course of action that can affect the business negatively.
3. Management
This system is more accurate and time saving.
Provides handy exception information that is useful in decision making.
This system is mostly dependent on the information from a transaction processing system.
In case of erroneous data then the decisions made from such data could be hazardous.
4. Transaction
Eliminates the needs for extra personnel.
Allows faster data processing and better customer service
Tasks that require batch processing cannot use the online transaction processing; printing invoices.
More powerful computers needed to handle large amounts of data are expensive.
5. Office
Provides best communication methods.
This system supports a wide range of business tasks
It is entirely electronic and requires technological knowledge.


Lindsay, J. (2000). Information Systems. London: Kingston University Press.

O’Leary, T. (2008). Computing Essentials Introductory. New York: McGraw-Hill.