Dyson-IUPAC

Various line notations have been devised to depict accurately both the atomic content and the orientation of the compound. Much of the focus in creating notation systems has been geared toward computer input and manipulation of structures. Some of the well-known notations include Wiswes.ser (WLN), Dyson-IUPAC, Hayward, Skolnik, Gremas and more recently also SMILES, and ROSDAL. All of these systems require a detailed memorization of their rules and conventions and are limited strictly to the audience familiar with those rules. 

WLN was one of the principal contenders for international acceptance by lUPAC, and because it was already being used by many chemical companies in the USA it was never supplanted by other linear notations such as Dyson-IUPAC, Hayward, or Skolnik. The general concept of all these notations does not differ from that in WLN, the differences lie only in details of the adopted encoding schemes. 

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