The main role of the typing ergonomics is to reduce the stress and strain in the joints and also helps to reduce the muscle strain related various types of problem. it basically define the workplace according to the user requirement.

It aim is to increase the productivity and also efficiency by reducing the discomfort of the user. It basically manage the angle and height by properly monitoring the computer system desk.

According to the OSHA statistics, the 95 percent of the people spend there day in front of the computer system in the office. Therefore, the ergonomics plays an important role for maintaining the heath of the people.

Home key is the one which is used to return the cursor to the beginning of the line. This happens in documents only where we can edit.
In cases where the documents cannot be edited, the home key is used to return the cursor to the beginning of the document.
Guide keys guide the user through the documents. There are mainly 4 guide keys- up, down, left and right arrow keys. Their main function is to move the cursor in the document.

Keyboard nahi dekhe ho kya kabhi?

• Alphanumeric keys – all of the letters and numbers on the keyboard. A-Z and 0-9.

• Punctuation keys – All of the keys associated with punctuation such as the comma, period, semicolon, brackets, parenthesis and so on. Also, all of the mathematical operators such as the plus sign, minus sign, and equal sign.

• Special keys – All of the other keys on the computer keyboard such as the function keys, control keys, arrow keys, caps lock key, delete key, etc.

Special keys on a PC Keyboard

• Alt key – Short for Alternate, this key is like a second control key.

• Arrow Keys – Most keyboards have four arrow keys that enable you to move the cursor (or insertion point) up, down, right, or left. Used in conjunction with the Shift or Alt keys, the arrow keys can move the cursor more than one position at a time, but this depends on which program is running.

• Backspace key – Deletes the character just to the left of the cursor (or insertion point) and moves the cursor to that position.

• Caps Lock Key – A toggle key that, when activated, causes all alphabetic characters to be uppercase.

• Ctrl key – Short for Control, this key is used in conjunction with other keys to produce control characters. The meaning of each control character depends on which program is running.

• Delete Key – Sometimes labeled Del, deletes the character at the current cursor position, or the selected object, but does not move the cursor. For graphics-based applications, the Delete key deleted the character to the right of the insertion point.

• Enter Key – Used to enter commands or to move the cursor to the beginning of the next line. Sometimes labeled Return instead of Enter.

• Esc Key – Short for Escape, this key is used to send special codes to devices and to exit (or escape) from programs and tasks.

• Function Keys – Special keys labeled F1 to F12. These keys have different meaning depending on which program is running.

A system software aids the user and the hardware to function and interact with each other. Basically, it is a software to manage computer hardware behavior so as to provide basic functionalities that are required by the user. There are two main types of software: systems software and application software. Systems software includes the programs that are dedicated to managing the computer itself, such as the operating system, file management utilities, and disk operating system (or DOS).

Memory is the capacity of the computer that how much it can store the files.

Storage Device is an alternative way to store data for example, pen drive and compact disk(CD)

Encryption is a process which transforms the original information into an unrecognizable form. This new form of the message is entirely different from the original message. That's why a hacker is not able to read the data as senders use an encryption algorithm. Encryption is usually done using key algorithms.
Decryption is a process of converting encoded/encrypted data in a form that is readable and understood by a human or a computer. This method is performed by un-encrypting the text manually or by using keys used to encrypt the original data.

Computer instructions are the basic components of a machine language program. ... Instructions are encoded as binary instruction codes. Each instruction code contains of a operation code, or opcode, which designates the overall purpose of the instruction (e.g. add, subtract, move, input, etc.). Computer-aided design (CAD) is the use of computers (or workstations) to aid in the creation, modification, analysis, or optimization of a design. ... The term CADD (for Computer Aided Design and Drafting) is also used. Its use in designing electronic systems is known as electronic design automation (EDA).

Input devices
Input devices take data from the 'outside world' (i.e. outside of the computer) and send it to the Central Processing Unit for processing. Data can be collected and entered into a computer in a range of ways. These include, for example, a keyboard, a mouse, a graphics tablet, a touch screen, a bar code reader, a magnetic stripe reader and so on. So data from the world outside of the computer is entered into the computer system using ‘input devices’.

Output devices
Every computer system will need to have a way of displaying information or printing information out so that it is useful to humans. There needs to be, therefore, some ‘output devices’. A very useful output device is a VDU (or Visual Display Unit). Another handy one that allows you to produce ‘hardcopy’ (i.e. a printout on paper) is a printer. It is possible that you also need an audio output. Speakers or headphones would be useful in these circumstances!

A database is an organized collection of data, generally stored and accessed electronically from a computer system. Where databases are more complex they are often developed using formal design and modeling techniques.

A bar chart or bar graph is a chart or graph that presents categorical data with rectangular bars with heights or lengths proportional to the values that they represent. The bars can be plotted vertically or horizontally. A vertical bar chart is sometimes called a column chart.

Scanner is a type of photocopier which is yes to make a soft copy of an image. A scanner is an input device that scans documents such as photographs and pages of text.This creates an electronic version of the document that can be viewed and edited on a computer. Most scanners are flatbed devices, which means they have a flat scanning surface.
Different types of scanner are
1) handheld scanners
2) flatbed scanners
3) drum scanners