Rohit kumar

CAD stand for Computer aided draughting and design.It enable us to draw polygon,ellipse,multiple parallel lines and multiple parallel curves.Companies uses CAD to produce better design more quickly and cheaply.In CAD we can make changes immediately and print a new drawing in minutes or we can transmit it all over the world using e mail service instantly.CAD enable companies to produce better design that are almost impossible produce manually. CAD is linked with CAM (computer aided manufacturing ) to produce computerise instructions for computerise machine control. Example :- lathe,mills,machining centre,welding equipment,automated assemblies.                  

Application software is written to solve a specific data processing task. There are two categories of applications software. 1 Pre written application software 2 User application software Example of applications software are word processing software,spreadsheet software,graphics software,entertainment software.        

                    DBMS stand for "data base management system"the word data base is made up of two word data and Base any row fact or figure is data.Ex- 14,John,4000,12th March 1999 etc... A data base is a collection of interrelated data.for example employee details of an organisation like employees name,employees number,salary,date of joining etc... can be called as data base. A data base management is software systems that allows access to data contained is a data base.objective of the database system is to provide a convenient and affective method of defining,storing and retrieving the information contained in the database.

A spreadsheet is simply a grid of boxes or cells set up in rows and columns.Every cell has a unique address corresponding to its row and column and first row is A1,cell in the third column and fourth.row is c4. Computer can find its way around the spreadsheet using those address and perform functions in the number you enter in those cells.

                A word processor is a software package which helps to enter and edit a document much faster than usual manual ways. A processing of acting on text like,cut,copy,paste,delete etc... are called word processing. Example of same word processor are word star,ms-word etc...some function that are possible using ms-word are given below. 1.Typing out the documents 2.Saving the document 3.Opening an existing document 4.Moving or copying paragraphs from one place in the document to another. 5.Finding the words and replacing them with another word. 6.Searching for spelling errors 7.Printing or sending the document via mail.