A 2003 General Motors concept car on display at the Test Track attraction at Disney World's Epcot.
The future of the car is a controversial topic, with some advocates arguing that the car has no future, and others that the car will in the future supplant most other forms of transport.
The main trend at the beginning of the 21st century is an increase in the number of cars in Asia.
The Principle of restricted choice is used in bridge to guide a player (usually the declarer) into finding the best line of play in certain situations. It is closely tied to the Monty Hall problem.
The principle can be expressed in several different ways; one of them is:
When a defender freely plays an important card (over declarer's lead), assume that it had to be played rather than it was result of a particular choice; adjust the subsequent play accordingly.

Traditional symbols of Valentine's Day include hearts, doves, Cupid and love notes. American postcard, circa 1900.
Telemarket Office