Abstract
Many different strategies for communication with extraterrestrial intelligence have been proposed since the invention of wireless communication. these strategies can be roughly divided into two categories: pictorial and non- pictorial (math-based) systems. Pictorial messages, such as the bitmap transmitted from the Arecibo radiotelescope in 1975, can be used to communicate a wide variety of ideas and symbols. Non-pictorial systems, such as Hans Freudenthal's language Lingua Cosmica (Lincos), allow the sender to build a symbolic vocabulary without the use of pixelated images.© (2001) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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