I call any subjects, connected with an information the informational objects. It is clear that information received from such informational object can be expressed by a text which is made of sentences. I call a set of sentences expressing information about some informational object recorder of this object. Some recorders systems form structures similar to clocks. The following results are obtained from the logical properties of a set of recorders: First, all such clocks have the same direction, i.e. if an event expressed by sentence A precedes an event expressed by sentence B according to one of such clocks then it is true according to the others. Secondly, time is irreversible according to these clocks, i.e there's no recorder which can receive information about an event that has happened until this event really happens Thirdly, a set of recorders is naturally embedded into metrical space. Fourthly, if this metrical space is Euclidean, then the corresponding "space and time" of recorders obeys to transformations of the complete Poincare group. If this metric space is not Euclidean then suitable non-linear geometry may be built in this space.