identifies a situation (singles it out and classifies). The analyzer-classifier is engaged in it. Its "Knowledge base" is laid down in subcortex from birth (the instincts). Simple control block cannot perform such actions. All actions of the systems controlled by elementary and simple control blocks would be automatic. Biological analogues of elementary control block are the axon reflexes working under the "all-or-none" law; those of simple control blocks are unconditional (Innate, instinctive) reflexes when certain automatic, but graduated reaction occurs in response to certain external influence. Simple control block would be adapting the system's actions better than the elementary one because it takes account of not only external influence, but the result of action of the system which has occurred in response to this external influence as well. But it cannot identify a situation. Complex control block can perform such actions. It reacts not to external influence, but to certain external situation which can exert certain external influence. Biological analogues of complex control block are complex reflexes or instincts. During pre-natal development the "knowledge" of possible situations "is laid down" into the brain of a fetus (the "knowledge base "). The volume of this knowledge is immense. A chicken can run immediately after it hardly hatches from egg. A crocodile, a shark or a snake become predators right after birth, i.e. they know and are able of doing everything that is required for this purpose. It speaks of the fact that they have sufficient inborn "knowledge base" and "base of decisions" for this purpose. In such cases we say that animal has instincts. Thus, the system with complex control block is the object which can react to certain external situation in which this influence may be exerted. But it can react only to fixed (finite) number of external situations which description is contained in its "knowledge base" and it has a finite number of decisions on these situations which description is contained in its "base of decisions". In order to identify external situation it has the "C" informant and the analyzer-classifier. In other respects it is similar to the system with simple control block. It can also react to certain external influence and its reaction is stipulated by type and number of its SFU. The result of action of the system is also graduated. The number of gradations is defined by the number of executive SFU in the system. It also has the analyzer-informant with the "database", DPC (the "X" informant) and NF (the "Y" informant), which control the system through the stimulator (efferent paths). There are no analogues with complex control block in inorganic/abiocoen, inanimate/nature. Biological analogues of systems with complex control block are all animals, from separate cells to animals with highly developed nervous system including cerebrum and remote sense organs, such as sight, hearing, s...
