Special Function Keys on Computer Keyboard

A computer keyboard is an input device used to enter characters and functions into the computer system by pressing buttons, or keys. It is the primary device used to enter text. A keyboard typically contains keys for individual letters, numbers and special characters, as well as keys for specific functions. A keyboard is connected to a computer system using a cable or a wireless connection.
However, producing some symbols may require pressing and holding several keys simultaneously or in sequence.While most keyboard keys produce letters, numbers or signs (characters), other keys or simultaneous key presses can produce actions or execute computer commands.
~Tilde
`Back quote, grave accent, left quote, open quote
Bang, Exclamation mark or Exclamation point
@At symbol, Arobase
#Hash, Octothorpe 
£Pound symbol
Euro
Dollar currency sign
¢Cent sign
Indian rupee sign
¥Chinese Yuan
§Micro or Section
Percent
°Degree
Caret or Circumflex
And
*Asterisk and star.
Open parenthesis
Close parenthesis
– Hyphen, Minus or Dash
_Underscore
Plus
Equals
Open Brace, squiggly brackets, or curly bracket
Close Brace, squiggly brackets, or curly bracket
Open bracket
Close bracket
Pipe, Or, or Vertical bar
Backslash or Reverse Solidus
Forward slash, Solidus
Colon
Semicolon
Quote, Quotation mark, or Inverted commas
‘ Apostrophe or Single Quote
<Less Than or Angle brackets
>Greater Than or Angle brackets
,Comma
.Dot or Full Stop
?Question Mark

Others Computer Keys

TabComputer keyboards that inserts a tab character or moves the insertion point to the next tab stop.
ShiftThe shift key is a modifier key on a keyboard, used to type capital letters and other alternate “upper” characters. There are typically two shift keys, on the left and right sides of the row below the home row.
CtrlControl key is a modifier key which, when pressed in conjunction with another key, performs a special operation; similar to the Shift key, the Control key rarely performs any function when pressed by itself.
WWindows key
AltThe Alt key on a computer keyboard is used to change the function of other pressed keys. Thus, the Alt key is a modifier key, used in a similar fashion to the Shift key.
SpacebarThe space bar, Space bar, blank, or space key is a key on a typewriter or alphanumeric keyboard in the form of a horizontal bar in the lowermost row, significantly wider than other keys.
Print ScrnClick on the window you would like to capture. Press Ctrl + Print Screen (Print Scrn) by holding down the Ctrl key and then pressing the Print Screen key. Click the Start button, located on the lower left-hand side of your desktop. Click on All Programs. Click on Accessories. Click on Paint.
Page Up and DownThe Page Up and Page Down keys are two keys commonly found on computer keyboards. The two keys are primarily used to scroll up or down in documents, but the scrolling distance varies between different applications.

Most computer keyboards contain four arrow keys for moving the cursor or insertion point right, left, up, or down. When combined with the Shift, Function, Control, or Alt keys (on PCs), the arrow keys can have different meanings. For example, pressing Shift +Up-arrow might move the cursor or pointer up an entire page.

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