The formation of adults and process by which they are initiated into the Church is known as the "Rite of Christian Initiation of Adults," or "RCIA."
Unbaptized persons at the age of reason (7 years and older) who follow a process to help them grow in awareness to God's call to conversion as well as ways to respond to that call. They are considered catechumens.
Baptized in Another Christian Church: those catechized and uncatechized persons from a faith tradition other than Catholic who are seeking full communion with the Roman Catholic Church (Eucharist and Confirmation). They are considered candidates.
Baptized but uncatechized Catholic Adults: persons who were baptized as infants in the Catholic Church yet not given any religious upbringing within the Catholic Tradition. These adults will be prepared to celebrate the sacraments of penance, confirmation, and eucharist. They are also considered candidates.
http://www.catholic.com/documents/how-to-become-a-catholic
For more information on our RCIA program, please contact the Parish Offices at (978) 957-0322.