Classification of Database Management System

Database Management System can be classified on several DBMS criteria.

A) On the Basis of Data Models.

Data model is a collection of high level data description that hides many low level storage details. A data Model has following three Components:
1) A Structural Part that consist of a set of rules according to which database is constructed.
2) A Manipulating Part That defines type of operations that are allowed on data.
3) A set of integrity rules that ensures that data is correct.
The Data Models are further divided into Three Categories: 

I) Object Base Data Models: Object based data models defines a database in terms of objects, their properties, and their operations .Objects of same behavior and structure belongs to a class and classes are organized into hierarchies. The operations of each class are specified in terms of predefined procedures called methods. Commonly used object based data models are:

Types of Operating System

Type	Definition	Example
Batch Processing System	Data along with programs collected and grouped and is processed on later date.	Pay Roll Systems, Stock Control Systems, Billing Systems.
Real Time Systems	These are those operating systems in which input immediately affects the outputs and timing is critical.	Chemical Processing Systems, Nuclear Power Plant Control Systems.
Real Time Transaction	These are those Operating Systems in which input immediately affects the output but timing is not critical.	Air Ticket booking Systems, Hotel Booking Systems.
Proprietary OS	Proprietary OS is licensed under legal right of the copyright holder with the intent that the licensee is given the right to use the software only under certain conditions, and restricted from other uses, such as modification, sharing, studying, redistribution, or reverse engineering	Windows OS all Versions
Open Source OS	These are those OS Software whose Source code is free to users. Anybody can help I development and modifications.	Linux, UNIX