Scan is a railroad operations and share trading board game in the 18xx series, published by Deep Thought Games in 2005. The game is one of the smaller 18XX titles, and was designed by David G.D. Hecht in order to introduce gamers to some of the more "exotic" systems used in other designs. 18Scan includes 1835-style minor companies, an 1835-style merger corporation, 1870-style destination rules (for the minor companies), 1856-style company flotation rules, and market-priced incremental capitalization rules as in 1851 and 1826.