Abstract
Machine understanding can be regarded as problem solving in this context understanding means finding a solution to a problem. Machine understanding aimed at understanding objects from many different categories of objects described in [102, 103] involves understanding objects from the category of visual objects, the category of sensory objects or the category of text objects. Understanding a visual object means solving problem of naming/recognizing of the objects. In Chap. 8 naming objects that are members of the real world object category was presented. In this chapter naming objects that are members of the sign category will be described. Some issues connected with learning naming of objects from the sign category were presented in [102, 103]. In this chapter understanding signs is regarded as problem solving connected with finding meaning of these signs.