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An extended right-regular grammar is one in which all rules obey one of . A → w, where A is a non-terminal in N and w is in a (possibly empty) string of terminals Σ *; A → wB, where A and B are in N and w is in Σ *.
NASPA Word List (NWL, formerly Official Tournament and Club Word List, referred to as OTCWL, OWL, TWL) is the official word authority for tournament Scrabble in the USA and Canada under the aegis of NASPA Games. [1] It is based on the Official Scrabble Players Dictionary (OSPD) with modifications to make it more suitable for tournament play.
Normal Accidents: Living with High-Risk Technologies is a 1984 book by Yale sociologist Charles Perrow, which analyses complex systems from a sociological perspective.. Perrow argues that multiple and unexpected failures are built into society's complex and tightly coupled systems, and that accidents are unavoidable and cannot be designed a