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System

1. A group of interacting, interrelated, or interdependent elements forming a complex whole.

2. A functionally related group of elements, especially:

a. The human body regarded as a functional physiological unit.

b. An organism as a whole, especially with regard to its vital processes or functions.

c. A group of physiologically or anatomically complementary organs or parts: the nervous system; the skeletal system.

d. A group of interacting mechanical or electrical components.

e. A network of structures and channels, as for communication, travel, or distribution.

f. A network of related computer software, hardware, and data transmission devices.

3. An organized set of interrelated ideas or principles.

4. A social, economic, or political organizational form.

5. A naturally occurring group of objects or phenomena: the solar system.

6. A set of objects or phenomena grouped together for classification or analysis.

7. A condition of harmonious, orderly interaction.

8. An organized and coordinated method; a procedure. See synonyms at method.

9. The prevailing social order; the establishment. Used with the:You can't beat the system.

(2). A Database Management System (DBMS) is a set ofcomputer programs that controls the creation, maintenance, and the use of adatabase. It allows organizations to place control of database development in the hands of database administrators (DBAs) and other specialists. A DBMS is a system software package that helps the use of integrated collection of data records and files known as databases. It allows different user application programs to easily access the same database. DBMSs may use any of a variety ofdatabase models, such as thenetwork model or relational model. In large systems, a DBMS allows users and other software to store and retrieve data in astructured way. Instead of having to write computer programs to extract information, user can ask simple questions in a query language. Thus, many DBMS packages provideFourth-generation programming language (4GLs) and other application development features. It helps to specify the logical organization for a database and access and use the information within a database. It provides facilities for controlling data access, enforcing data integrity, managing concurrency, and restoring the database from backups. A DBMS also provides the ability to logically present database information to users while the Operating System (OS) is thesoftware on a computer that manages the way differentprograms use its hardware, and regulates the ways that a usercontrols the computer. Operating Systems is also a field of study within Applied Computer Science. Operating systems are found on almost any device that contains a computer with multiple programs—from cellular phonesand video game consoles to supercomputersand web servers. Some popular modern operating systems for personal computers includeMicrosoft Windows, Mac OS X, and Linux.The most important programthat runs on acomputer. Every general-purpose computer must have an operating system to run other programs. Operating systems perform basic tasks, such as recognizing inputfrom the keyboard, sendingoutputto the display screen, keeping track of files and directorieson the disk, and controlling peripheral devicessuch as disk drivesand printers.