Robots have been a staple in the works of science fiction. Robots are presented in several different ways in the media, and they are especially popular with the “end of the world” themed stories. Technically, robots are similar to machines. They are mechanical machines, mostly software-driven, and created to accomplish a series of actions or perform tasks that are more perilous for humans.
Droids, on the other hand, are short for androids, which are humanoid robots that bear the physical resemblance to humans, but their internal mechanisms connect them to modern robots. They refer to sensing, planning, and control. They may be able to handle changes, and they are far more complex than their robotic equivalents.