A computer is a programmable machine designed to perform arithmetic and logical A computer system (fig) consists of mainly four basic units; namely .. and learning windows. One can get help .. examples. 3. Write short notes on a. This book aims to give students an overview about basic computer science, it designed for novice computer users. Computer hardware refers to the physical parts or components of a computer such as the monitor, mouse, Cengage Learning, ronaldweinland.info3. . often broken into two major categories: system software that provides the basic non- task- specific.
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COMPUTER BASICS. Seema Sirpal components of your computer such as the system unit . Computer Based Training (CBT) offers a low cost solution to. society e - learning groups of people having difficulties accessing basic computer education viz. . This is an icon for a file in the PDF format named syllabus. Computer Basics Lesson The Front of a Computer and Peripheral Devices . To make learning easier, every exercise follows certain conventions.
Joystick Memory A personal computer must have a means of storing information data and instructions so that it can perform processing tasks on the data. Personal computers have two types of memory. These are discussed below. You can not store any data in ROM. The instructions in ROM are set by the manufacturer and cannot be changed by the user. The last instruction in ROM directs the computer to load the operating system.
The moth was removed when Mark-I started functioning. It was then stated that "Mark I was 'Debugged'. These two words are commonly used words now in relation to both the hardware and software of computer.
After this the progress in the Digital Computers has been simply stupendous amazing. These relate to the binary coding scheme for data representation, storage of data and program within the computer, the manipulation of programs by other programs, choice of alternative procedures and use of input- output devices for feeding data and retrieving information.
Reduction in size, improved reliability, reduction in operating cost. Reduction in size. Fifth Generation -: Development continued The storing capacity of computer is expressed in bytes.
Normally one byte stores one character of data. A computer can process any kind of data. But this idea is only for the counting of small entities.
Vacuum tubes are used to electronic circuit iii. Storage capacity was limited 1kb to 4kb iv. Storage capacity in measured in mega byte. Slow processing millisecond iv. High voltage needed up to volts.
VLSI and micro processer are used ii. Transistor were used iv. Input and output device were faster incomplete… i. Easy human computing i. ICs were used in place of transistor iii.
They have artificial intelligence. Applications Of Computer: Now a days, it is difficult to find the field or the criteria in which there is no use of computer. Directly or indirectly there is vast use of computer. When it is pressed on it gives capital alphabets and when it is off it gives small alphabets.
In case of Nepali font it shows half character, when it is on. Enter: - It is used to break the lines, paragraph or columns. Shift: - it is used to display capital and small alphabets by holding shift we can bring changes in the character.
Tab: - It is used to give long space between two character and words Space bar: - It is used to give space between two character and word. Back space: - It is used to remove character at the back of the cursor. Delete: - It is used to remove character at the right of the cursor. End: - It is used to move the cursor at the end of the line. Home: - It is used to move the cursor at the beginning of the line. Page up: - It is used to move the cursor one page up.
Page down: - It is used to move the cursor one page down. Esc: - It is used to cancel any job function. Num lock: - It is used to lock and unlock the numeric pad. When you click the start button, you will see a menu, which contains everything you need to begin using windows. Desktop icons are those icons, which remains on the desktop. It is especially used for switching between opened programs and folders.
Here: Themes: Changes the current theme on desktop Desktop: Changes the wallpapers or fill color on background of desktop Screen Saver: Apply screen saver using photo slideshow, text, flag, ribbons, etc.
On the file menu, Select New Folder press enter key. Type the name of the folder and then press It consists of the deleted item for recovery. It is a popular operating system developed by Microsoft Corporation. Click on start button.
Choose program. Choose accessories.
Choose paint and click on it, or, 1. Click on start Button. Click on Run. Type Mspaint inside the box. Click on Ok. To show hide Tools, Color box, Status bar: 1. Go to View menu. Enable or disable required options by clicking at once. Saving your work: To close and exit from Wordpad After finishing your work, After finishing your work, 1.
Go to file menu. Click on save. Then, click on yes, if you want to save and click on No, if you don't want to save. Then, Open dialog box will appear.
Click on open.
Click on new. Then, New dialog box will appear. Choose required document type. Click on ok. Go to view menu. Put or remove the tick mark from required above items. Click on either or save As. Then, save as dialog box will appear. Give required file name. Required text: Click the left mouse button either in initial or final point of the text and drag it up to destination and release it. Or, go to edit menu and click on select all.
First select required text. Then press either Delete or, Backspace key. Errors that may occur are usually due to inaccurate data, wrong instructions or bug in chips — all human errors.
If you can input the necessary data with correct instructions, computer will do the processing. Also, data is safe from normal wear and tear associated with paper.
Computers do not get tired or bored. Computers can take up routine tasks while releasing human resource for more intelligent functions. Regular electric supply is necessary to make computers work, which could prove difficult everywhere especially in developing nations. Booting Starting a computer or a computer-embedded device is called booting. BIOS is a firmware, i.
If a system is already running but needs to be restarted, it is called rebooting.