Atlas Shrugged/Technology

 Airplanes
 Automobile
 Diesel engines
 Phonograph records
 Radio
 Telephone
 Television (mentioned in Section252?)
 Traffic Signals

Fictional technology in Atlas Shrugged:

 Refractor rays (Gulch mirage)
 Rearden Metal 
 Sonic death ray (Project X)
 Voice activated door lock (Gulch power station)
 Static electricity-powered motor
 Palm-activated door lock (Galt's NY lab)
 Shale-oil drilling
 Portable X-Ray machine
 Nerve-induction torture machine