Acknowledgements

The author expresses gratitude to the editor for useful advices. The author is grateful to Prof. Noam Chomsky for words of support to the development of the "Set of Strings" Framework. The author is also thankful to Prof. Jeffrey Ullman for useful remarks on the current state of the theory of grammars.

Augmented Post Systems: Syntax, Semantics, and Applications DOI: http://dx.doi.org/10.5772/intechopen.86207
