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  Chapter-8 COMPUTER SOFTWARE    Definition of software Software is a set of programs, procedures, and routines associated with the control and the operation of the computer system, in fulfilling the user needs. The software also includes documentation that guides one through the operation. Software is the creation of human mind. Software is off two types 1- System software     2-Application software System software- These are the programs that activate and monitor the activities of the hardware components of the computer system. The programs are provided by the manufacturers, vendors on specialized software developing houses. The program that comes under this category are: 1- Operating system 2- Utilities Operating system- Operating system is an integrated set of specialized programs that is used to manage the resources and overall operation of the computer. It acts as an interface between the application programs of the user and the internal hardware. Utilitie...

  CHAPTER-7 TYPES OF COMPUTERS   Computers are classified on the basis of data type, purpose and capacity . Data types- On the basis of type and the manner in which they accept, represent and process data computers can be classified as-   1-          Analog computer 2-          Digital computer 3-          Hybrid computer   Analog computer - Computing devices that operate on data in the form of continuously varying physical quantities, such as pressure, temperature, speed, revolution distance and voltage etc. are termed as analog computer. An analog computer is essentially a measuring device. For example, the automobile speedometer and the slide roll.             Since the analog computer measures and compares quantities in one operation, it has no storage and the result ...

 Chapter-6 OUTPUT DEVICE The output unit is device where the result of the program is obtained. The most commonly output devices are: 1- THE VISUAL DISPLAY UNIT (VDU)/MONITOR 2- PRINTER 3- SOUNDBOX. VDU/MONITOR - A monitor is an electronic output device used to display information being entered and processed on a computer. The primary use of monitor is to display images, text, video and graphics information generated by the computer. Monitor are two types: a- CRT (CATHODE RAY TUBE) b- TFT (THIN FILL TRANSISTOR) PRINTER - Printers are primary output devices used to prepare permanent documents (hard copy) for human use. Printers are classified by how they print and by how fast they operate. PRINTER | ------------------------------------------------ | | IMPACT NON-IMPACT | ...

  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...

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...

 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....