This paper aims to bring out the significant contribution of the Professor Lotfi A. Zadeh,"the father of Fuzzy Logic" in the field of Soft Computing. The computational Theory of Perceptions (CTP) deals with the automated processing of human knowledge expressed in Natural language. The development of computational system based on the Computational Theory of Perceptions is a challenging task that requires taking into account knowledge extended to several scientific disciplines such as Fuzzy Logic, Linguistics and Software Engineering. The Computational Theory of Perceptions is based on the methodology of computing with words. In CTP words play the role of labels of perceptions and more generally, perceptions are expressed as propositions in a natural language. Computing with words (CW)- based techniques are generally used to translate propositions expressed in a natural language into Generalized Constraint Language (GCL).

1. Fuzzy Sets: (1964). L. A. ZADEH (Professor Department of Electrical Engineering and Electronics Research Laboratory, University of California, Berkeley, California.
2. From Computing with Numbers to Computing with Words—From Manipulation of Measurements to Manipulation of Perceptions. (1999). Lotfi A. Zadeh (Professor in the Graduate School and Director, Berkeley initiative in Soft Computing (BISC). Computer Science Division and the Electronics Research Laboratory, Department of EECS, University of California, Berkeley, California,USA.
3. Toward a Generalized Theory of Uncertainty (GTU)—An Outline (2005) Lotfi A. Zadeh (Professor in the Graduate School and Director, Berkeley initiative in Soft Computing (BISC). Computer Science Division and the Electronics Research Laboratory, Department of EECS, University of California, Berkeley, California,USA
4. Human perceptions versus computational perceptions in Computational Theory of Perceptions.

Computational Theory