prototype
early sample or model built to test a concept or process, generally used to evaluate a new design by system analysts and advanced users
Ares I-Y
cancelled test rocket in the NASA Constellation program
Ares I-X
prototype and design concept demonstrator rocket
Reid-Ramsay steam turbine locomotive
experimental steam-turbine-electric locomotive
Volvo Philip
motor vehicle
The Gadget
nuclear bomb produced by the Manhattan Project
minimum viable product
prototype safe for public use
Gemini
artificial intelligence chatbot developed by Google
McDonnell Douglas DC-X
prototype single-stage-to-orbit rocket
Human Universal Load Carrier
exoskeleton
Mighty Eagle
prototype robotic lander developed by NASA
Unmanned Combat Air System Demonstrator program
Prototype of a fighter plane
Electric Dog
phototropic automatic vehicle developed in 1912 as a study for future weapon systems
Ocelot Arcade System
one-off vector based home video game console
ANS synthesizer
optically controlled music instrument
British Rail APT-E
prototype Advanced Passenger Train tilting train unit
Brown Box
Prototype of the Magnavox Odyssey
essay
coin prototype
Peugeot RC
motor vehicle
GE steam turbine locomotives
model of 2 steam turbine locomotives
Lanchester petrol-electric car
Prototype hybrid automobile
Mechanical eagle
Leonardo da Vinci's drone prototype
Developer Transition Kit
2020 prototype ARM-based Macintosh computer announced by Apple Inc.
Open Assistant
open-source artificial intelligence chatbot by LAION
La Fortune (James Tissot)
prototype of fountain crowning
Sokol
prototype of a planned Russian high-speed train
Scarab
robotic lunar rover prototype
Little Willie
prototype in the development of the British Mark I tank
proof of concept
realization of a certain method or idea in order to demonstrate its feasibility
proof of concept
realization of a certain method or idea in order to demonstrate its feasibility
Oxford Electric Bell
experimental electric bell that was set up in 1840
Midland Railway Paget locomotive
experimental British eight-cylinder 2-6-2 locomotive
Experimental three-phase railcar
experimental railcar built in Germany to assess possibilities of using electric motive power for rail transport
Chariot
lunar vehicle prototype by NASA
Second Marcus Car
second automobile designed by Siegfried Marcus
SR Leader class
Prototype dual cab steam locomotive
Norfolk and Western Railway class TE
class of 1 American steam-turbine-electric locomotive
Single-hole cassette
Unrelased audio tape format
Tank Grote
1930s Soviet tank prototype
Star Trek project
Apple Computer prototype operating system
USS Excelsior
spacecraft in Star Trek
Lamborghini Concept S
2005 concept car based on the ' Lamborghini Gallardo '
Sprint
Terminal anti-ballistic missile system
Peugeot Flux
motor vehicle
Cavell Van
historic railway rolling stock
Nintendo Advanced Video System
home game console
Zobel
German reconnaissance vehicle