Baptism, Holy Communion and Reconciliation, Confirmation
Acceptance into the Order of Catechumens is the first stage of the Rite of Christian Initiation.
The Celebration of the Sacraments of Initiation is presented to the elect in the Rite of Christian Initiation.
They are called Sacraments of Initiation as the rest or our Christian lives depend on them. The Sacraments of Initiation are Baptism, Confirmation and Eucharist.
Catechumenate
Christian Initiation
Most adults in the Rite of Christian Initiation of Adults (RCIA) celebrate the Sacraments of Initiation (Baptism, Confirmation, and Eucharist) at the Easter Vigil Mass on Holy Saturday night.
Baptism always included in Christian initiation because it is accomplished by means of the sacraments which establish the foundations of Christian life,but Christian initiation not only hold the Baptism but to other sacraments of the church also. The faithful born anew by Baptism are strengthened by Confirmation and are then nourished by the Eucharist.
In the Roman Catholic tradition initiation is synonymous with catechises or Sunday school if you will.It is the process of teaching Catholic doctrines.
the RCIA- Right of Christian Initiation for Adults
RCIA - the Rite of Christian Initiation of Adults
Rite of Christian Initiation for Adults. Its the process by which adults are baptized.
I suppose it differs between which form of Christianity you are talking about, such as Catholicism and Presbyterianism.