What is DBMS? :
A collection of software for organizing the information in a database that might contain routines for data input, verification, storage, retrieval, and combination .
What is RDBMS? :
A database management system (DBMS) with the ability to access data organized in tabular files that can be related to each other by a common field. An RDBMS has the capability to recombine the data items from different files, providing powerful tools for data usage.
What is DATA? :
A representation of facts, concepts, or instructions in a formalized manner suitable for communication, interpretation, or processing by humans or by automated means .
What is Information? :
Information is a term with many meanings depending on context, but is as a rule closely related to such concepts as meaning, knowledge, instruction, communication, representation, and mental stimulus.
What is Information Management System? :
IMS (Information Management System) is a joint hierarchical database and information management system
What is Data Abstraction? :
A data type with a private representation and a public set of operations. The C++ language uses the concept of classes to implement data abstraction.