use of Print Screen SysRq key

Use of Print Screen SysRq key

It is a key located on a keyboard before "Scroll Lock key" 

How to use:
we can use this key to capture the screen by just clicking on the button and then just need to apply "paste command " or"ctrl +v".

sometime you have seen some books in which all steps are explained by step to step. this task been completed with the "printScreen Key" when  we just go through the steps and capture at each point.

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shortcut to open Different application of Ms-office with Run Command

Shortcut to open Different applications of Ms-office with Run Command

press window key with R or go to start menu and select RUN option from right hand side .

you will see a run command dialog box type there then you can press ok,cancel or browse

• Ms-Word : Type winword in the Run Dialog Box
• Ms-Excel:  Type excel in the Run Dialog Box
• Ms-Powerpoint: Type powerpnt .

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Parts of C.P.U

Parts of C.P.U

C.P.U  is Central Processing Unit, It has 3 man parts:

• ALU(Arithmetic and Logic Unit): This unit carries out all mathematical and logical operations.

• CU(Control Unit): This unit controls the transfer of information form one part of the C.P.U to the other.

• MU(Memory Unit): This unit stores the data in the computer.

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Why we say Centrally processing unit not controlling unit to C.P.U???

Why we say Centrally processing unit not controlling unit to C.P.U???

C.P.U: The full form of C.P.U is Central Processing Unit not Control Processing Unit although we all know that the C.P.U is the brain of the computer.This is where the computer does all its Processing work.It is very important hardware device. It controls all the working

but the Reason Behind Central Processing Unit is that:

computers works in three steps that is I.P.O.

1. input
2. processing
3. output

first we have to give input to the system to work upon then the system goes it in its 2nd stage that is processing which is done by C.P.U and after processing done by c.p.u it further forwarded to the monitor to display or we can say for output 

as monitor is an output device.

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Selecting text with the Keyboard

Selecting text with the Keyboard

• One word: Place the cursor at one end of the word.Then press Shift, and move the cursor with the help of the arrow keys to the other end of the word.
• More than one word: Similar to selecting one word.
• More than one line: After selecting one line, keep pressing the Down arrow key along shift key.
• Whole document (entire text): Press Ctrl+A

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Selecting text with the Mouse

Selecting text with the Mouse

• One Word: Double-click on the word.

• More than one word: Click and drag the mouse till the end of the text.
• More than one line: Click and drag the mouse up or down.
• Paragraph: Triple-Click on the first word of the paragraph.
• Selecting a range: Place the cursor at the end, press Shift, and click at the beginning.

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Keyboard

Keyboard

Computer receives most of its input from the user via keyboard that is very similar to a typewriter.

Keys:

Backspace Key: Deletes the character just to the left of the cursor and moves the cursor to that position.

Delete Key: Deletes the character at the current cursor position or to the right of the insertion point or deletes the selected content.

Arrow Key: Four Arrows keys for moving the cursor or insertion point right,left,up or down.Moving the arrow keys doesn't delete any character on the screen.

Caps Lock Key: A toggle key that, when activated ,causes all alphabetic character to be uppercase.

Home Key: Moves the cursor to the top left corner of the screen or tho the beginning of the file.

End Key: Moves the cursor to the end of the line, the of page.

Enter: Used to enter commands or to move the cursor to the beginning of the next line.

Esc: Short for Escape. This key is used to send special codes to the device or to exit.

Function Key: Special keys labeled F1 to F12 each key perform different functionality according to the application we are using.

Ctrl Key: Short for control.This key is used in conjunction with other keys to produce control characters.

Alt Key: Short for Alternate. Same as Control key.

Pageup and Pagedown: Moves the cursor up of down and abbreviated as PgUp or PgDn.

Numeric Keypad: A separate set of keys on some keyboards that contain the numbers 0 to 9 and decimal with some operators like

+,-,*,/.

to use from this area Num Lock Must Be ON.

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