Keyboard – Input Unit/Devices

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Computer Key Board- Computer Fundamental- mLand India Technologies

A computer Keyboard is an input device that allows a user to enter letters, numbers, and other symbols which are present in a Keyboard into a computer. Using a Keyboard to enter lots of data is called typed document.  A Keyboard contains many mechanical switches or push-buttons called “Keys”.

Keys:

The Computer Keyboard Keys are all derived from the typewriter that helps user to input texts, numbers and various other function(Data) Keys can be used.

Keyboard Layouts:

There are a number of different arrangements of alphabetic, numeric, function and punctuation symbols on keys. These different keyboard layouts arise mainly because different people need easy access to different symbols, either because they are inputting text in different languages, or because they need a specialized layout for mathematics, accounting, computer programming, or other purposes.

Keyboards are basically of two types:

+  Qwerty

+  Dvorak

+  Qwerty Keyboard

What is a querty keyboard

The QWERTY (pronounced KWEHR-tee ) keyboard is the standard typewriter and computer Keyboard in countries that use a Latin-based alphabet. The name was given from the first six letters on the row above the home row keys. This layout is most widely used because of its convenience and universal standard. 

+  Dvorak Keyboard

what is a Dvorak keyboard

A keyboard designed for speed typing. The Dvorak Keyboard was designed in the 1930s by a professor of education, named August Dvorak and his brother-in-law, William Dealy. Unlike the traditional QWERTY Keyboard, the Dvorak Keyboard is designed so that the middle row of keys includes the most common letters. Dvorak is designed differently for left handed and right handed people. It makes typing easier to one hand people.  

What Is The Difference Between Qwerty And Dvorak Keyboards?

There is really no difference between a QWERTY Keyboard and a Dvorak Keyboard except for the arrangement of the letters. In almost all Keyboards that uses the QWERTY format, you would find the same letters in the same position. The Dvorak layout comes in a variety of layouts to fit the people who use them perfectly.

There are three different types of PC keyboards are:

Original PC Keyboard with 84 keys.

AT Keyboard with 84.

Enhanced Keyboard with 101 keys.

What Are The Types Of Keys In A Keyboard?

The keys on your keyboard can be divided into several groups based on function:

A:  Escape Key

B:  Function Keys (F1-F12)

C:  Command Keys

D:  Light Indicators

E:  Multi Functional Keys

F:  Back Space

G:  Modifier Keys

H:  Alphabet Keys (A-Z)

I:  Space Bar

J:  Function Key

K:  Right Click

L:  Enter Key

M:  Arrow Keys

N:  Numeric Keys

A:  Escape Key

Bemer invented the ESC Key as way for programmers to switch from one kind of code to another. It is a Key (frequently labeled Esc) found on most computer keyboards and used for any of various functions, as to interrupt or cancel the current process or running program, or to close a pop-up window.

B:  Function Keys (F1-F12)

The Function Keys are used to perform specific tasks. They are labeled as F1, F2, F3, and so on, up to F12. The functionality of these keys differs from program to program. On some keyboards/computers, Function Keys may have default actions, accessible on power-on.

C:  Command Keys

The Command Key, also historically known as the Print Screen, Scroll Lock and Pause/Break, is a modifier Key present on a Normal Keyboards. The Command Key’s purpose is to allow the user to enter Keyboard Commands in applications and in the system.

D:  Light Indicators

An Indicator is a Light or LED that prompts the user to the status of a hardware device. Examples of Indicators include the Indicators for when the hard drive is working (reading/writing) and when the caps lock is enabled. The above picture shows the three Indicator LEDs on the Keyboard.

E:  Multi Functional Keys

The Multi Functional Keys are Keys present on a Normal Keyboards which are used for multiple options, such as number and for symbols. When you normally press the key it input below numbers and when you press “Shift+The Same Key”, it input the symbols as provided in Key Board.

F:  Back Space

Backspace Key is the Key that originally pushed the typewriter carriage one position backwards, and in modern computer systems moves the display cursor one position backwards, deletes the character at that position, and shifts back the text after that position by one position. The Backspace Key is sometimes referred to as the rubout Key, which is reference to a “rubout” Key found on early terminal and computer Keyboards.

G:  Modifier Keys

A Modifier Key modifies the action of another key when the keys are pressed at the same time. Common modifier keys include Shift, Function, Control, Alt, Command, and Option. The Shift key is found on all keyboards, while the other keys may be exclusive to laptops or Windows or Macintosh computers.

H:  Alphabet Keys (A-Z)

A Keyboard contains different Keys or buttons and these Keys represent unique Alphabets, numbers or special signs. The Keys which contain Alphabets on them are known as the Alphabet Keys. These Alphabet Keys are arranged in “QWERTY” sequence on the Keyboard.

I:  Space Bar

The Space Bar/ Blank/ 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. Its main purpose is to conveniently enter a space, e.g., between words during typing.

J:  Function Key

The Function Key used for managing different functions for keyboard. It is used for multi purpose. It also called “Multi Purpose Function Key”.

K:  Right Click

However, many modern keyboards don’t have this. In some Keyboard has a universal shortcut key, called”Right Click“, which does exactly the same thing. It will do a right-click on whatever is highlighted or wherever the cursor is in Windows/ Applications.

L:  Enter Key

Alternatively known as a Return Key, with a keyboard, the Enter Key sends the cursor to the next line or executes a command or operation. Most full-sized PC Keyboards have two Enter Keys; one above the right Shift key and another on the bottom right of the numeric keypad.

Why Enter Key Is Called Return Key?
Also called the “Return Key,” it is the keyboard key that is pressed to signal the computer to input the line of data or the command that has just been typed. The Enter key was originally the “Return Key” on a typewriter, which caused the carriage to return to the beginning of the next line on the paper.

M:  Arrow Keys

These are alternatively referred to as Cursor Keys/ Direction Keys/Navigation Keys, the Arrow Keys are usually located in between the standard section and the numeric pad on computer keyboards. It is made up of four keys:

+  Left Arrow (Back Arrow)

+  Up Arrow

+  Down Arrow

+  Right Arrow (Forward Arrow)

N:  Numeric Keys

It is a separate set of keys on some keyboards that contain the numbers 0 through 9 and a decimal point arranged as on an adding machine. Numeric Keypad make it easier to enter large amounts of numeric data. Frequently, the keys on the numeric keyboard also serve as cursor control keys.

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