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Caps Lock Shift Key(Vi) Control Keys (Xi) Page up (Ctrl) Key (Vii) Alt Key and Page Down Key

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CHAPTER 4 MORE ABOUT THE KEYBOARD The arrangement of characters on a QWERTY keyboard was designed in 1868 by Christopher Sholes, the inventor of the typewriter. The keyboard and mouse are used for performing various functions. A keyboard is a device which consists a number of buttons. A keyboard has 104 keys. The buttons on a keyboard are called keys. It is a rectangle board. Keyboard is used to enter words, sentences, numbers, particular signs and symbols on the computer screen. The keys of a keyboard can be divided into six categories. SL. NO. NAMES OF KEYS CATEGORIES NUMBER OF KEYS 01 Letter Keys A to Z 26 02 Number Keys 0,1,2,3,4,5,6,7,8,9, 10 10 03 Function Keys F1 to F2 12 04 Symbol Keys !,@,#,$,%,^,&,*,(,) 10 05 Arrow Keys 04 06 Special Character Keys (i) Enter Key (ii) Delete (viii) ESCAPE (ESC) Keys (iii) Backspace Key Key (ix) Tab Key (x) (iv) Spacebar Keys (v) Caps Lock Shift Key(vi) Control Keys (xi) Page UP (Ctrl) Key (vii) Alt Key and Page Down Key PAGE-23 1. LETTER KEYS : - Letter Keys are used to type letters. There are 26 letters keys from A to Z. They are arranged in the jumbled manner. Capital and small letters can be typed using the same keys by pressing or releasing caps lock or shift key. 2. NUMBER KEYS : - There are ten number keys from 0 to 9. Each number keys types a separate number. There are two sets of number keys, one top of letter keys and the other on the right side of the keyboard. With combination of these keys, we can type any number we want. ! @ # $ % ^ & * ( ) 1 2 3 4 5 6 7 8 9 0 This portion of the keyboard allows us to use the keyboard like a NUM / -- LOCK * calculator and input numbers. It has a Num Lock Key i e number 7 8 9 + 4 5 6 E Lock Key. When it is made ON, it will activate the keypad on the 1 2 3 N 0 . T E keyboard so that numbers may be entered. R 3. FUNCTION KEYS : - There are twelve function keys from F1 to F12.These keys are used to give different instruction to the computer. F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 4.SYMBOL KEYS : - These keys have special signs and symbols which are required at the time of writing. Some symbol keys are used to write the letter keys such as : - !,@,#,$,%,^,&,*,(,)etc. are placed over the numbers on the Number Keys . You can use these as symbol keys by pressing the shift key along with the number key. ! @ # $ % ^ & * ( ) 1 2 3 4 5 6 7 8 9 0 PAGE-24 5. ARROW KEYS : - Arrow keys are also called cursor keys. There are four keys with arrow marked on them. These keys are used to move the cursor in different directions on the screen .The second name of Arrow Keys is Navigation Keys. (i) LEFT ARROW KEY:- This key moves the text cursor to the left side in the same line. (ii) RIGHT ARROW KEY:- This key moves the cursor to the right side in the same line. (iii) UP ARROW KEY:- This key moves the cursor upward on the document. (iv) DOWN ARROW KEY:- This key moves the cursor downward on the document. 6. SPECIAL CHARACTER KEYS (i) ENTER KEY:- The Enter Key is used to bring down the text to ENTER the next line. A keyboard has two Enter Keys on the keyboard. (ii) DELETE KEY:- The Delete Key is used to erase the letter to DELETE the right of the cursor. It also removes the selected text or item on the screen. (iii) BACKSPACE KEY:- The Backspace Key is used to erase the letter to the left of the cursor. It also erases the selected part by us PAGE-25 (iv) SPACEBAR KEY:- We use the spacebar key to move the head by one space. Spacebar key is used to give space the right of the character or words. It is the longest key on the keyboard. SPACEBAR . (v) Shift KEY:- Shift Key is used with the other keys for Shift different purpose. If you press and hold the shift key along with a letter key, It will type a letter in capital even when the Caps Lock is turned off. SOME EXAMPLE FOR SHIFT KEY :- + GIVES A (When the Caps Lock is Off) Shift A + GIVES a (When the Caps Lock is On) Shift A There are some keys on the keyboard which have two symbols or a number and a symbol on it . To type the upper symbol you need to press and hold the shift key alongwith the particular Symbol Key or Number Key. Shift + 1 ! Shift + = + PAGE-26 (vi) CONTROL (Ctrl) KEY:- There are two control (ctrl) keys on a keyboard. When we press them with another key, they perform a special operation. Control key is generally used in conjunction with Ctrl other key to perform some Operation . This key can not be used alone. (vii) Alt KEY:- This key is also used with another key for alternative. In Alt combination with other key , it is used to perform certain functions. (viii) ESCAPE (ESC) KEY:- The short form of escape key is ESC. IT is placed at the top left corner in most of the keyboards. This key ESC allows us to cancel an operation. (ix) TAB:- You can press the Tab key to move the cursor for getting space character forward at once. (x) CAPS LOCK KEY:- Caps Lock key is used to type the letters in Capital or Small case. Keyboard has a light for CAPS LOCK Caps Lock that indicates whether the Caps Lock is ON or OFF. EXAMPLE If Caps Lock key is ON, the letters are written in the capital letters. Caps Lock is ON:- I LOVE MY COUNTRY. • If Caps Lock is OFF, the letters are written in small case. Caps Lock is OFF:- i love my country. (xi) PAGE UP OR PAGE DOWN KEY:- Page Up is used to move a page up. Page down is used to move a page down. PAGE-27 EXERCISE Q1. Tick (√) the correct option. (i) The buttons on a keyboard are___________________. (a) Keys (b) Letters Keys (c) Numbers Keys (ii) Which of the following keys do we use to erase words to the left? (a) Letter Keys (b) Number Keys (c) Backspace (iii) Which key allows us to type capital letters continuously? (a) Number Keys (b) Caps Lock Key (c) Letter Keys (iv) Which of the following keys do we use to move the cursor? (a) Number Keys (b) Arrow Keys (c) Enter Keys (v) How many letter keys does a keyboard have? (a) Ten (b)20 (c)26 (iv) Which keys give us space between two letter and numbers? (a)Number Keys (b) Arrow Keys (c) Spacebar Q2. Give the statement ‘T’ for True and ‘F’ for False. (i) A keyboard has total number of 104 keys. (ii) There are ten number keys from 0 to 9. (iii) The short form of escape key is ESC. (iv) Delete Key is used to go to next line. (v) Spacebar key is smallest key on the keyboard. (vi) Shift Key is used with the other keys for one purpose. PAGE-28 Q3. Fill in the blanks. HELP BOX Number, Left Side, Type , Two , Shift , Right Side, (i) There are ___________________sets of number keys. (ii) Letter keys are used to ________________the text. (iii) Delete key is used to erase letters from the __________________ of the cursor (iv) Backspace key is used to erase letters from the _______________ of the cursor. (v) ___________________ keys are used for type the text. (vi)_________________ Keys are used in combination with other keys. Q4. According the above given description, who are we. (i) We are 12 in number, who we are? ______________________ (ii) We are 26 in number, who we are? _____________________ (iii) We are 10 in number, who we are? ______________________ (iv) We are 4 in number, who we are? _______________________ (v) We are 2 in number, who we are? ________________________ (vi) I am 1 in number, who I am ________________________ (vii) We use this key to type CAPITAL LETTERS only, who I am ___________________ Q5. Unscramble (jumbled) the following and write correct words. (i) CCKIL______________(ii) FTISH_______________(iii) HTRIG__________________ (iv) FTLE______________(v) XTNE _______________(vi) CTIONFUN______________ (vii) TTERLE___________(viii) LETEDE______________(iii) BARSPACE_____________ PAGE-29 Q6. Match the following. (i)Function Key (a)Ten (ii)Number Key (b)Twelve (iii)Enter Key (c)One (iv)Spacebar Key (d)Four (v)Arrow Key (d)Two Q7. Answer the questions given below : -- Q. (i) Who did invent the keyboard? Q. (ii) Why do we use keyboard? Q. (iii) How many sets of number keys are there on the keyboard? Q. (v) Which key is used to move the cursor to the next line? Q. (v) What is the use of backspace key? Q. (vi) What is the use of delete key? Q.(vii) What are keys? Q. (viii) What is the function of arrow keys? Q8. Draw the two diagram of number keys. PAGE-30 .
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