The Nomad 200 or N200 was a commercial research robot

Robot

A robot is a mechanical or virtual intelligent agent that can perform tasks automatically or with guidance, typically by remote control. In practice a robot is usually an electro-mechanical machine that is guided by computer and electronic programming. Robots can be autonomous, semi-autonomous or...

 manufactured in the 1990s by Nomadic Technologies, Inc. It was a cylindrical robot around 1 metre tall and 20 inches in diameter and moved on three wheels. It could travel at 0.5 metres per second and rotate at 60 degrees per second.

The basic robot, comprising the mobile base and the control system, cost $16,000 in 1990. It could be equipped with 16 sonar

Sonar

Sonar is a technique that uses sound propagation to navigate, communicate with or detect other vessels...

 sensors mounted around the circumference, 16 infra-red sensors, a magnetic compass, a TV camera and laser rangefinder system and two rows of ten contact sensors. The additional sensor systems cost between $1,500 and $7000.

It was controlled by an on-board Intel 486

Intel 80486

The Intel 80486 microprocessor was a higher performance follow up on the Intel 80386. Introduced in 1989, it was the first tightly pipelined x86 design as well as the first x86 chip to use more than a million transistors, due to a large on-chip cache and an integrated floating point unit...

based computer system.