Arduino is an open-source hardware and software company, project and user community that designs and manufactures single-board microcontrollers and microcontroller kits for building digital devices.
People are doing incredible things with Raspberry Pi every day. Their mission is to put the power of computing and digital making into the hands of people all over the world. They do this so that more people are able to harness the power of computing and digital technologies for work, to solve problems that matter to them, and to express themselves creatively.
Robotics is an interdisciplinary branch of engineering and science that includes mechanical engineering, electronic engineering, information engineering, computer science, and others.
Arduino and Raspberry pi are major names in education and embedded world. These are used in robotics and IoT products.