The most exciting and interesting field now a days is obliviously robotics. It is most emerging and developing field where everyday a new innovation is out there in the market. So many kind of robots like robotic arm, humanoids, steady robots, moving robots, car robots etc.

Basically robot is an electromichenical device means it is a combination of electronics and mechanics. It is flexible mechanism which can be moved to different positions using different motors (AC, DC, Stepper etc.). Different movements are actuated by controlling signals that are generated by electronic circuit. The circuit generates different signals to control the motion of mechanism depending upon the requirements. The operation can be divided into  three categories 

1. manual

2. semi automatic

3. fully automatic

In manual operation the controlling signals are generated depending upon user command like move up, move down, rotate, pick, place etc.

In semi automatic operation some action does not require any user command they operated automatically

And in fully automatic operation there is not a single user command full operation operates in a pre determined sequence

As you can see it is obvious that in second and third case there is a need to generate controlling signals without any human command. Means one has to program the robot to generate these signals himself. This is the instances from where the function of computer or micro controller or micro processor starts.   

Most of the robots found now a days are programmed/programmable devices. They are programmed to perform some specific and required task. Most probably robots are designed to perform such tasks that are repetitive or need more accuracy or it may be a hazardous. Usually the task that can not be easily performed by a human is allotted to robot like producing VLSI chip, finding a clot in small pipeline, finding out mines and bombs and diffuse them and so many other tasks.

Robots are categorized into so many different categories depending upon their application. They can be broadly classify into these three categories

1) Industrial Robots:-  more then 50% of total robots are made for industrial application robotic arm, robotic Crain etc.

2) Domestic Robots:-  this is totally new applications for robots where robots plays a part of home servant, or matron or may be a companion

3) Military and space Robots:- This is the actual work field for robots where all the tasks are to much hazardous for humankind. A robo-vehicle, motorized robot, Unmanned guided vehicle (UGV), Automatic guided vehicle (AGV), unmanned aircraft and lots more are the example of this kind of robots.

Now a days a robots are equipped with Embedded technology and Artificial Intelligences (AI). 

Embedded technology means the hardware which works on the platform of software embedded (loaded) in it.

Artificial Intelligences means the program that will enable the robots to think up to the very primary level.