Tablets

A 24th-century Personal Access Display Device on Star Trek: The Next Generation.
Photo Credit: CBS
Voice Activation
Virtual Reality

William T. Riker enters a holodeck simulation.
Photo Credit: CBS
Universal Translators

Captain Kirk uses the universal translator to communicate.
Photo Credit: CBS
3D Printers
Hands-Free Phones

Lieutenant Uhura using her earpiece.
Photo Credit: CBS
Video Chatting

Video calls are common aboard Starfleet ships.
Photo Credit: CBS
Synthetic Meat