What kind of apostolate does Opus Dei do?

The chief apostolate of the Prelature's faithful is that which they carry out in their own milieu, not as a group endeavor, but as the natural and spontaneous expression of their Christian commitment. This apostolate sees friendship as a true Christian value; a good Christian tries to be a loyal and true friend. In addition, because of their desire to contribute to building a better world and to helping those most in need, Opus Dei members join with others to organize educational and social projects (schools, hospitals, professional training centers, universities, etc.). These are all quite diverse, with the distinct personality of their respective countries and cultures.