Virtual Reality
A simulated 3-D environment that a user can experience and manipulate as these were physical. The user sees the environment on display screens, possibly mounted with special pairs of goggles.Special input devices such as gloves, suits and other devices fitted with motion sensor that detect user actions. Virtual reality is a term that applies to computer-simulated environments that can simulate places in the real world as well as in imaginary worlds. Most current virtual reality environments are primarily visual experiences, displayed either on a computer screen or through special stereoscopic displays. But some simulations include additional sensory information such as sound through speakers, movement of the surroundings and lightening effects.

Virtual reality is often used to describe a wide variety of applications associated with immersive, highly visual and 3D environments. The development of CAD software, graphics hardware acceleration, head mounted displays, database gloves and neatness have helped simulate the visual environment as real one.

The advantages of virtual reality are as follows:

Military application for testing, implementing and training.
Medical field for practitioner purposes.
It is broadly used in flight training and gaming applications.
It is mainly used in computer related manufacturing with simulation.
Virtual reality is also used in motion pictures.
It also implemented in radio, fine art, music and fictions.

Robotics:

A branch of engineering devoted to the creation and training of robots. Roboticists works within a wide range of fields, such as mechanical and electronic engineering, cybernetics, bionics and artificial intelligence. At the end of their creation, they check all the features like sensory awareness, physical dexterity, independence and flexibility as possible. Hence, robotics is the engineering science and technology of robots, their design, manufacture, application and structural disposition. Robotics is related to electronics, mechanical and software. The electro-mechanical digital devices process and store the information which directed by the software. The mechanical parts generate a frameset and shape for the robots. And software creates the robots efficient for the execution of jobs for which it is designed.

Application areas of robotics are as follows:

It is broadly used in industry where humans are at high risk.

It is used for accuracy cutting and finishing.
It is used in vehicle and car factory automation.
Surgeons prefer robotic assistance surgery.
They are also used for disable people.
Bomb diffusion, land mine detection, and military operations also use robots.
It is broadly used in space.
It can be used as toy for playing.