EN
Hegel's theory of concepts may be analyzed in the framework of a logical calculus of terms. The calculus is founded on a binary relation of 'including' (> or =), holding between terms. This relation is considered as an ordering relation. Four types of term domains are possible. One of them, with the root and the co-root (the biggest and the smallest element of domain) is taken to be a ground of Hegel's logic of terms. Some strange features of Hegel's logic found in the 'Preface' of the 'Phenomenology of Mind', such as 'checking the course of thinking', 'meeting by a counter-thrust' and 'absorbing the meaning of the subject within the predicate' are analyzed. It is shown that Hegel's logic can be considered as a special kind of a general logic of terms.