Ten Scientific Objects that Changed the World: What's Your Favorite?

New Scientist has a nice rundown of the 10 Scientific Objects that Changed the World. The list comes from Science Museum, which is polling readers to decide the most significant among them. The choices: the steam engine, the electric telegraph, the Model T Ford, the V2 Rocket Engine, the DNA double helix, Stephenson's rocket, the X-ray Machine, Penicillin, the Pilot ACE Computer, and the Apollo 10 capsule.I think my vote goes to the double helix, but all of these objects are clearly significant. What do you think? Are there any glaring omissions?