1968 introductions

self-interests causing depletion of a shared resource

thumb|upright|A METAR processing and transmitting unit installed at Pittsburgh-Butler Regional Airport, [[Pennsylvania, U.S.]]

proposed explanation for how trying to improve traffic flow actually has the reverse effect

American film rating system

model for assessing likelihood of bankruptcy

Australian holiday character

shorthand system for English developed in 1968 by James Hill

brand of tobacco product

Concept in legged locomotion

urban legend from United States

rose cultivar