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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 *.
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
Netcom On-Line Communication Services, Inc., 907 F. Supp. 1361 (N.D. Cal. 1995), [1] is a U.S. district court case about whether the operator of a computer bulletin board service ("BBS") and Internet access provider that allows that BBS to reach the Internet should be liable for copyright infringement committed by a subscriber of the BBS.