The abstracts comprise of the scientific life, because almost all the articles that are published in magazines specialized in the fields of natural sciences, the technology, the information and the medicine go preceded of this important component. It is difficult to find a scientist whom has sometimes not had to write up an abstract. This has caused that is questioned, on the one hand, why his preparation appears within information theory and documentation, if it is an action that apparently anyone can make and, on the other hand, if the abstract has more value done by an expert. Although procedures of evaluation recognized do not exist, that give a categorical and objective answer to this question, the certain thing is that the preparation of abstract is a work that internationally has been reserved to the specialists in information, considering that they constitute the suitable personnel for it.