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What robots are, and the kinds you'll meet at work
In this lesson you'll
- Define a robot in plain language: sense, decide, act
- Name the main kinds of robots at work and what each is good at
- Read the latest global robot numbers without overreading them
What counts as a robot?
A robot is a machine that can sense its surroundings, decide what to do (by following a program or a learned model) and act in the physical world by moving itself or something else. A dishwasher acts but doesn't sense and decide much. A self-driving warehouse cart senses obstacles, picks a route and moves: that's a robot.
Software "bots" that click through screens (robotic process automation) share the name but not the body. This course is about physical robots.
The robots you'll meet at work
| Kind | What it does | Where you'll see it |
|---|---|---|
| Industrial robot arms | Weld, paint, assemble, load machines, palletize; fast, precise, repetitive | Auto, electronics, metal, food, plastics plants |
| Collaborative applications | Robot arms set up to work near people, using speed and separation monitoring, power and force limits or hand guiding | Small manufacturers, packaging, labs, machine tending |
| Mobile robots (AMRs and AGVs) | Move goods. AGVs follow fixed paths; autonomous mobile robots (AMRs) map spaces and route around obstacles | Warehouses, hospitals, factories |
| Service and inspection robots | Clean floors, inspect pipes and tanks, deliver items, assist in surgery | Facilities, utilities, hospitals |
| Drones | Inspect, survey, map, count inventory | Construction, agriculture, energy, public safety |
| Humanoids | Two-armed, often two-legged robots built for spaces designed for people | Early pilots in warehouses and factories |
A note on words: people often say cobot for a robot that works beside people. The 2025 revision of the international robot safety standard prefers collaborative application, because safety depends on the whole setup (tool, task, speed, layout), not just the robot model.
The numbers, as of late 2026
The International Federation of Robotics (IFR) publishes the standard global statistics each fall. Its World Robotics 2026 report found:
- 603,307 industrial robots were installed worldwide in 2025, up 11% and the first year above 600,000.
- About 5.08 million industrial robots were in operation, a record.
- China installed about 354,000, or 59% of the world total.
- The United States installed 38,400, up 12%, and became the second-largest market, passing Japan.
Two cautions. These figures count industrial robots (mostly arms), not warehouse AMRs or humanoids, which IFR tracks separately as service robots. And installations in one year say little about any one company's results.
How a robot cell comes together
Buying a robot arm rarely means plugging in a machine. A working robot cell includes the arm, the tool on its end (gripper, welder, suction cups), sensors and cameras, safety equipment, a controller and software, fixtures that hold parts, and integration with conveyors and other machines. Specialist system integrators usually design and install it. Budgets and timelines live in the integration, not just the robot.
Workplace example: a plastics molder
A 90-person plastics company in Indiana struggles to staff a night shift for unloading parts from molding machines. Rather than a humanoid or a large automation line, it adds a collaborative application: a small arm with a vacuum gripper that unloads parts onto a conveyor while one operator oversees three machines. The job of "unloader" shrinks; the job of "cell operator" grows.
Try it
Think of one repetitive physical task in your workplace or community (moving boxes, inspecting, cleaning, sorting, loading). Ask an approved AI tool:
For this task: [describe it in two sentences], which kinds of robots (industrial
arm, collaborative application, mobile robot, drone, service robot or humanoid)
could help, and why? For each, name one practical limit. Say "uncertain" where you
are not sure, and don't invent company names or statistics.Compare its list with the table in this lesson.
Key takeaways
- A robot senses, decides and acts in the physical world.
- Main kinds: industrial arms, collaborative applications, mobile robots, service robots, drones and humanoids.
- IFR's World Robotics 2026: 603,307 industrial robots installed in 2025 and about 5.08 million in operation; the US is now the second-largest market.
- A working robot is a whole cell: tooling, sensors, safety, software and integration.
Sources