I come in many different colors. I create boundaries to keep things concealed and safe. My best friend is a lock and I am also made of different materials as well. I love to travel: you can find me anywhere. What am I?
I have to communicate with different people, and always keep them in the loop on important matters. I deal with a lot of buttons, knobs and numbers. I am surrounded by metal and I have a duty to carry humans with safety and comfort. Who am I?
