Transformers is the name of a line of toys produced largely by Takara and sold outside of Japan by Hasbro from 1984 onwards. A Transformer is a sentient machine that's able to "transform," reconfiguring itself into a common and innocuous form, such as a car, aircraft, or animal. The taglines "More Than Meets the Eye" and "Robots in Disguise" reflect this ability.
There have been a number of spinoffs based on the toys, including a Marvel comic book series, an animated television series that began airing in 1984, and feature-length movies like The Transformers: The Movie. The original series was followed by spinoffs with varying levels of popularity. This article uses material from the Wikipedia article "Transformers" and is licensed under the GNU Free Documentation License.