Tyco International is like a big company that does lots of different things. Imagine Tyco is like a big toy box with all sorts of toys inside. Some toys are blocks and other toys are cars, but with Tyco, instead of toys, they have things like security systems and fire protection equipment.
Tyco started in 1960 in Massachusetts, USA. It grew into a big company that has branches all around the world. They have guys and girls who help them make, sell, and install all sorts of things that help people and companies like hotels and hospitals stay safe.
So, think of Tyco like a superhero that looks after us and our important stuff. They do things like sound alarms if there's a fire or someone tries to break into a building, and they can even help stop floods from destroying important stuff!
Overall, Tyco is like a really big company that helps us stay safe and protect the things that are most important to us.