The first laptop computer weighed 24 pounds 10 kilograms! What were early computers like and who made them? Find out about the first supercomputers, the first personal computers, the first smartphone, and more.About the Author: Megan Cooley Peterson has been an avid reader and writer since she was a little girl. She has written nonfiction children's books about topics ranging from urban legends to gross animal facts. Megan is also working on her first novel. She lives in Minnesota with her husband and daughter.