Management Information Systems (MIS) is the study of people, technology, and organizations.
If you enjoy technology like iPhones, iPods, and Facebook, you have what it takes to major in information systems. All you need is an interest in technology and the desire to use technology to improve people's lives. Many people think that MIS is all programming. However, programming is just a small part of our curriculum and there are many, many jobs in MIS where you do not program. 

The discipline of MIS can be categorized :

-Transaction Processing System:

A transaction process system (TPS) is an information processing system for business transactions involving the collection, modification and retrieval of all transaction data. Characteristics of a TPS include performance, reliability and consistency.

TPS is also known as transaction processing or real-time processing.

-Enterprise Collaboration System : An Enterprise Collaboration System (ECS) is an information system used to facilitate efficient sharing of documents and knowledge between teams and individuals in an enterprise. ECS tools include the Internet, groupware, various forms of software and hardware and internal and external networks. ECS functions optimally in a collaborative working environment (CWE).
-MIS :Management information system are typically computer systems used for managing three primary components: technology, people (individuals, groups, or organizations), and data (information for decision making). management information systems are distinct from other information system, in that they are used to analyze and facilitate strategic and operational activities.

-Decision Support System: A decision support system (DSS) is a computer-based inforation system that supports business or organizational decision making activities. DSSs serve the management, operations, and planning levels of an organization and help to make decisions, which may be rapidly changing and not easily specified in advance. Decision support systems can be either fully computerized, human or a combination of both.
-Executive Information System:

An executive information system (EIS) is a type of management information system that facilitates and supports senior executive information and decision making needs. It provides easy access to internal and external information relevant to organisatinal goals. It is commonly considered a specialized form of ecision support system (DSS).

EIS emphasizes graphical displays and easy-to-use user interfaces. They offer strong reporting and drill down capabilities. In general, EIS are enterprise-wide DSS that help top-level executives analyze, compare, and highlight trends in important variable so that they can monitor performance and identify opportunities and problems. EIS and data warehousing technologies are converging in the marketplace.

-Knowledge Management :comprises a range of strategies and practices used in an organization to identify, create, represent, distribute, and enable adoption of insight and experiences. Such insights and experiences comprise knowledge, either embodied in individuals or embedded in organizations as processes or practices.

-Strategic Information System :

A Strategic Information System (SIS) is a system that helps companies change or otherwise alter their business strategy and/or structure. It is typically utilized to streamline and quicken the reaction time to environmental changes and aid it in achieving a competitive advantage.

Key features of the Strategic Information Systems are the following:

1) Decision support systems that enable to develop a strategic approach to align Information Systems (IS) or Information Technologies (IT) with an organization's business strategies

2) Primarily Enterprise resource planning solutions that integrate/link the business processes to meet the enterprise objectives for the optimization of the enterprise resources

3) Database systems with the "data mining" capabilities to make the best use of available corporate information for marketing, production, promotion and innovation. The SIS systems also facilitate identification of the data collection strategies to help optimize database marketing opportunities.

4) The real-time information Systems that intend to maintain a rapid-response and the quality indicators.

-Functional Business System : Functional business systems provide decision-makers feedback and information on the daily operation of the business. Transaction processing, management information, decision support and many more information system supports business functions, such as accounting, finance, marketing, operations management and human resource management.Although, functional business sytems are grouped into the five main areas listed above and shown in the diagram below, in the day to day operations of a business, many times the lines are blurred. These cross-functional systems enable businesses provide vital, time sensitive information that enable a business to both maintain its critical competitive edge as well as enhance it.