A robot is a machine, especially one programmable by a computer, capable of carrying out a complex series of actions automatically.
They are different than an android, which is a synthetic organism designed to mimic living creatures.
- Hulk (Robot)
- Iron Man (Robot)
- Machine Men
- Master Mold
- Spider Seeker
Human Torch was an android.
Robots were popular for Saturday morning cartoon shows at the time because censors were more lenient about violence against them than against living creatures.