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ESCAPE key1.Short forescape,escis a key located on the top-left of a computer keyboard that allows a user to cancel or abort operations.TAB keyTAB is used for tabulation (indenting the first line of a new paragraph) when using the computer as a word processor. It is also used to advance from one item to the next item when filling in forms.Alt keyTheAlt key(pronounced/lt/) on a computer keyboard is used to change (alternate) the function of other pressed keys. Thus, the Alt key is amodifier key, used in a similar fashion to theShift key. For example, simply pressing "A" will type the letter a, but if you hold down either Alt key while pressing A, thecomputerwill perform anAlt+Afunction, which varies fromprogramto program.Ctrl keyIncomputing, aControl keyis amodifier keywhich, when pressed in conjunction with another key, performs a special operation (for example,Ctrl+C); similar to theShift key, the Control key rarely performs any function when pressed by itself.SPACE BARA long horizontalkeyon the lower edge of akeyboardthat is always the largest key on the keyboard. When thespacebar keyis pressed it creates an empty space, also known as a space character that helps separate words and other characters in a sentences. In the below keyboard picture, is an example of the spacebar.ENTER KEYAlternatively referred to as areturn key, theenter keywhen referring to a keyboard is used to return acursorto the next line or execute a command or operation. It is common for most standard keyboards to have two enter or return keys, one on the keyboard and another on thenumeric keypad.CAPS LOCK KEYCaps Lockis alock keyfound on manycomputer keyboards, depending on the localkeyboard layoutthey implement. It is located in the position of a similarShift lockkey (and sometimes aCtrlkey) found in some other keyboard layouts.SHIFT KEYTheshift keyis amodifier keyon akeyboard, used to typecapital lettersand other alternate "upper" characters. There are typically two shift keys, on the left and right sides of the row below thehome row. The shift key's name originated from thetypewriter, where one had to press and hold the button to shift up the case stamp to change to capital letters; the shift key was first used in theRemingtonNo. 2 Type-Writer of 1878; the No. 1 model was capital-only.[1]BACKSPACE KEYSometimes referred to as therubout key, thebackspace keyorback space keyis akeyboardkeyused to delete anycharacterbefore the current position of thecursorthat is adapted from typewriters. For example, click themouse buttonat the end of the below text and press backspace to delete the last character in the line. As seen in the picture the backspace key always has an arrow that points to the left, on Apple Macintosh computers, the backspace key is delete.CURSOR KEYCursor movement keysorarrow keysare buttons on acomputer keyboardthat are either programmed or designated to move thecursorin a specified direction.[1]The term "cursor movement key" is distinct from "arrow key" in that the former term may refer to any of various keys on a computer keyboard designated for cursor movement, whereas "arrow keys" generally refers to one of four specific keys, typically marked with arrows.TYPEWRITER KEYAtypewriteris a mechanical or electromechanical machine for writing in characters similar to those produced by printer'smovable typeby means of keyboard-operated types striking a ribbon to transfer ink or carbon impressions onto the paperNUMERIC KEYPADAkeypadthathasbecomeastandardfeatureofPCkeyboards,consistingofarectangulararrayof17extrakeysattheright-handend:0-9,.,Num Lock,/, *,-,+andEnter.ApartfromNumLock,thesetypicallyduplicatethefunctionofotherkeysbutaredesignedtomakeenteringbasicnumericalcalculationsasquickasonadigitalcalculator.EXTRA KEYMany keyboards include somespecial keys(also calledhotkeysormultimedia keys), which are supposed to execute an application or print special characters (not included in the standard national keymaps).udevcontains a large database of mappings specific to individual keyboards, so common keyboards usually work out of the box. If you have very recent or uncommon piece of hardware, you may need to adjust the mapping manually.WINDOWS KEYWindows logo key(also known asWindows key,start key,logo key,flag keyorflag) is akeyboardkey which was originally introduced on theMicrosoft Natural keyboardbefore the release ofWindows 95. This key became a standard key on PC keyboards. Tapping this key invokes the operating system'sstart menu, if it has one. In Windows,Ctrl+Escperforms the same function, in case the keyboard lacks this key.