Robot Is a Machine 

A robot is a machine —especially one programmable by a computer— capable of carrying out a complex series of actions automatically.
Robots can be guided by an external control device or the control may be embedded within.
Robots may be constructed to take on human form but most robots are machines designed to perform a task with no regard to how they look.

Robots can be autonomous or semi-autonomous and range from humanoids such as Honda’s Advanced Step in Innovative Mobility and TOSY’s TOSY Ping Pong Playing Robot (TOPIO) to industrial robots, medical operating robots, patient assist robots, dog therapy robots, collectively programmed swarm robots, UAV drones such as General Atomics MQ-1 Predator, and even microscopic nano robots.

By mimicking a lifelike appearance or automating movements, a robot may convey a sense of intelligence or thought of its own.
Autonomous Things are expected to proliferate in the coming decade, with home robotics and the autonomous car as some of the main drivers.-www.Justplay18.com

From the time of ancient civilization there have been many accounts of user-configurable automated devices and even automata resembling animals and humans, designed primarily as entertainment.
As mechanical techniques developed through the Industrial age, there appeared more practical applications such as automated machines, remote-control and wireless remote-control.

The word robot can refer to both physical robots and virtual software agents, but the latter are usually referred to as bots.
There is no consensus on which machines qualify as robots but there is general agreement among experts, and the public,
that robots tend to possess some or all of the following abilities and functions: accept electronic programming, process data or physical perceptions electronically, operate autonomously to some degree, move around, operate physical parts of itself or physical processes, sense and manipulate their environment, and exhibit intelligent behavior

— especially behavior which mimics humans or other animals.
Closely related to the concept of a robot is the field of Synthetic Biology, which studies entities whose nature is more comparable to beings than to machines.

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