Broadening the list of the protected results of intellectual property should not cause the deprivation ofthe possibility to have an access to a scientific and cultural domain and use it in society. Acquisition byusing intellectual property of global nature means the necessity to obtain permission to use the resultof intellectual activity in some jurisdictions and probably from different copyright holders. This raises theprice of using intellectual property and hence the price of access of society to the existing achievementsof the human mind in both cultural and technological areas. To solve these issues, the mechanism ofpublic domain can play a significant role. It is deserves noting that a simple withdrawal of objects fromcopyright protection may cause new challenges: weaker exclusive rights can cause not only broadeningthe sphere of free use of works by society but monopolization of the emerging sphere by people supervisingdatabases. The public domain regime allows averting this challenge setting rules and conditionsof using third party’s results of intellectual activity. At that, this regime may be lucrative to both users andcopyright holders which in turn use borrowed results of intellectual activity in the commercial activityincluding the creation of new objects. The paper features the fundamental functions of public domain.These functions are various and they go beyond the limits of the internal regulation of intellectual property.However, the regime of public domain lacks efficiency in terms of stimulating initiative in innovationsand creating new results as the mechanism of exclusive rights works better. Thus, complex regulationof issues of intellectual property taking into account the potential of every available instrument maybecome the most efficient. In this case, the regime of public domain may be a crucial tool for regulatingintellectual property and using information in general.