What is a Computer Keyboard?
The keyboard is still the primary device for inputting information to a computer, though voice input devices may ultimately supersede it. It operates by converting key presses to electronic signals in binary digital form. The typical computer keyboard has the standard character keys found on a typewriter together with a number of special keys described below:
- Function keys, up to 12 in numbers, positioned above the character keys, which can be programmed by the user or by the software being run, so that a single key depression sends a command or string of commands to the computer.
- The CTRL and ALT keys (short for Control and Alternate), which are always used in conjunction with other keys to issue commands to the computer.
- The Backspace key, which delete the character to the immediate left of the cursor on the screen.
- The four arrow keys, which move the cursor one character position in the direction of the arrow.
- The PageUp and PageDown keys, which are normally programmed to move the cursor one page up or down.
- The Home key, which may be programmed to move the cursor to the left of the screen or the beginning of the document.
- The End key, which may be programmed to move the cursor to the right of the screen or the end of the document.
- The Esc key, which is often programmed to enable you to escape from your currently selected option or task.
Related posts:
-
The mouse is a hand-held device with optical laser protruding from its base. As you push the mouse over the surface of the desk, the...
-
Programs written in a computer’s machine language can be directly executed by the computer’s electronic circuits, without any intervening interpreters or translators. These electronic circuits,...
-
It is quite easy to convert the spoken word to a digital signal for computer input. The microphone converts audio signals to electrical waves and...
-
One type of character-recognition device enables the user to input text and numerical data by handwriting it in capital letters on the pressure-sensitive surface using...
-
Chain printer as show in the image bellow. Print characters are contained in a chain, which is moved continuously at a rapid rate by two...
-
The number of pixels or picture elements on the screen determines the resolution or clarity of the picture that monitors achieve. High-resolution monitors have resolution...
-
Printers are used to produce hardcopy of computer output, normally data or text, but also in case of certain printers, graphics, that is such as...
-
Dot matrix printers normally have 9 or 24 pins arranged in the form of a matrix as show in the image bellow. To print a...
-
Before a computer can get to work solving a problem, it must be given the program and the data if there is any. After it...
-
Character printers print one character at a time and hence they are slow printers. They are capable of printing at the rate of 30 to...
-
Google seems current problems with bath products filter to have. Marked all results indicating that it could be to pages, which harm the computer. Usually...
-
The development of the Internet is progressing with Windows 7. Not for nothing the first trials of the new Microsoft operating system bear ‘ Windows...
-
Hello via Twitter we are today on a drawing published some time ago on maneggs.com titled ‘ God ´s control buttons ´ encountered. Because the...
-
Flat screen are slowly replacing the conventional CRT monitors, as they are bulky. These were introduced for use on battery-operated portable computers, as these consume...
-
Yesterday I had the opportunity at a seminar on network security to participate. Including mark Semmler, a very well-known security expert said there. The 3...
