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MEMORY :RAM and ROM

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  CHAPTER-5   MEMORY   Memory is the place of storage for the instructions and data. There are two types of memory used in a computer, depending upon their method of storage and performance of data stored. They are -   1-         Main memory/ primary memory 2-         Mass memory/ secondary memory   Main/primary memory- These memory units are the storage locations that the CPU always looks in, for instructions and data. They are made up of electronic components and are accessible at speeds similar to that of the CPU. Thus they are a must for every computer system and so are also called as primary memory. Main memory is of two types: 1-          ROM-READ ONLY MEMORY 2-          RAM-RANDOM ACCESS MEMORY   ROM The ROM chips preprogramed. As the suggest of information only can be read b...

CENTRAL PROCESSING UNIT:ALU,CONTROL UNIT,MEMORY

CHAPTER- 4   CENTRAL PROCESSING UNIT   The central processing unit (CPU)is the single most important component that distinguishes electronic computers from all other data handling devices. It accepts data and instructions from the user through the input devices, and stores them in the memory unit. According to the instructions, it manipulates the data in the Arithmetic and logic unit (ALU), storing the semi processed and processed information in the memory. At the end of the process, it gives out the required information in the consists of three sub units: 1.        Control unit     2. Arithmetic logic unit     3. Memory unit     CONTROL UNIT- The control unit directs and coordinates activities of the computer system which includes: 1.        Control of input and output devices 2.        Entry and retrie...

SHORTCUT KEYS:THE NEW TRICKS

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 Chapter-3 Part-2 SHORTCUT KEYS:THE NEW TRICKS  With CTRL 1.     CTRL+A - ALL select 2.     CTRL+B -Bold letter 3.     CTRL+C - copy 4.       CTRL+V -paste the copy 5.     CTRL+D -delete,formate in MS word ,duplicate in excel 6.     CTRL+E -center of the text 7.     CTRL+F – find out a word in MS word 8.     CTRL+G – go to the page in MS word 9.     CTRL+H –replace 10.  CTRL+ I-Italic 11 CTRL+J-check the document in google 12 CTRL+K-hyperlink 13 CTRL+M-increase indent 14 CTRL+N- new document or blank file 15 CTRL+O- open file 16. CTRL+P-print 17. CTRL+R-right 18 CTRL+S- save a file 19 CTRL+T- new tab   20. CTRL+U- underline 21. CTRL+X- cut 22. CTRL+Z -undo OTHER 23.ALT+Tab- switch program 24.ALT+F4+enter – shutdown 25.ALT+F4 – close program 26.window+D – minimise all program 27....

PARTS OF COMPUTER: Hardware, Model , Input device, Keyboard, Special function keys

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Chapter-3 ENGLISH AND HINDI ENGLISH-  PART -1 UNITS OF COMPUTER-  The study of computer involves the study of 2 specific units 1- Hardware 2- Software. DEFINATION OF HARDWARE - The physical components of computer like -display,fan,light,key board etc are called hardware.These are function units of computer hardware(mainly)-1-Input,2-CPU(Central Processing Unit),3-output.  💻 Basic Computer Model with Main Parts +--------------------------------------------------+ |                    Monitor (Display)             | |      [Visual Output - shows the user interface]  | +--------------------------------------------------+                         |                         | HDMI / Display Cable                 ...

HISTORY OF COMPUTER :Abacus, Analytical engine, ENIAC, Generations

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Chapter-2  HISTORY-  ABACUS-This was the first mechanical device developed in about 3500BC by the chinese  and later by the Japanese named" SORABAN". It is ABACUS. It is consist of rows of bead that slide on sticks or wires mounted on a rectangular frame .The frame devided into two sections so that each row of beads has one sectors with one or 2 beads and another sector with 5 beads. ADDING MACHINE-In 1642 Blaise Pascal a French man aged 19,invented a device to assist his father  [ a tax collecter  ] in adding a  long column of numbers .          ANALYTICAL ENGINE - In 1833 an English mathematician CHARLES BABBAGE developed the consept of Analitical engine.This  machine could perform arithmetic operation for any mathematical problem on data read in form of punched card and  a flexible output in the format of punched card on printed page. Babbage’s analytical engine  was comparable to modern computer no doubt his effo...

FUNDAMENTAL KNOWLEDGE OF COMPUTER: Data, Information, Characteristics

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💻 CHAPTER-1 1. WHAT IS COMPUTER? A computer is an electronic device that computes some raw data into meaningful information. The word" computer " derived from Latin word "computare",which means calculate. Computer can perform a wide range of tasks like: sending e mail ,playing games,creating prentation , calculation and browsing internet. 2. WHAT IS DATA? Data is a collection of row and unorganized facts that can be used as a sourse of information. They may consist of facts , number,names and figures. 3. WHAT IS INFORMATION? Information is a result of  processing data into a meaningful form. 4.CHARACTERISTICS OF COMPUTER- Speed -computer have tremendous processing speed.The speed of computer is used in terms of intitutions processed per second .The speed is very high thai special units are used for speed determination. Accuracy - The accuracy of computer is consistently high which is the case of human being.One could commit opporoximately one error in 50-100 calcul...