Apost. - Apostolic

Aux. - Auxiliary

Bibl. Miss – Bibliotheca Missionum

C. I. C. M. – Congregation of the Immaculate Heart of Mary (Scheutist)

C.M. – Congregation of the Mission (Vincentians, Lazarists)

C.M.F. – Missionary Sons of the Immaculate Heart of Mary (Claretians)

C.P. – Congregation of the Passion (Passionists)

CPA - Catholic Patriotic Association

C.S.S. – Congregation of the Sacred Stigmata

M.E.M. – Institute for Foreign Missions of Milan (since 1926 P.I.M.E.)

M.E.P. – Paris Foreign Missions Society

M.E.Q. – The Quebec Foreign Mission Society

M.E.R. – Institute of Foreign Missions of Rome (since 1926 P.I.M.E.)

M.I.C. – Missionaries of the Immaculate Conception of Lourdes

Mons. - Monsignore

M.M. – Catholic Foreign Mission Society of America (Maryknoll Fathers)

M.S.C. – Missionaries of the Sacred Heart of Jesus (Sacred Heart Missionaries)

O.A.R. – Order of Augustinian Recollects

O.E.S.A. – Ordo Eremitarum Sancti Augustini (later O.S.A.)

O.F.M. – Order of Friars Minor (Franciscans)

O.F.M.Cap. – Order of Capuchin Friars Minor (Capuchin Franciscans)

O.F.M.Conv. – Order of Friars Minor Conventual (Conventual Franciscans)

O.P. – Order of Preachers (Dominicans)

OR L' Osservatore Romano

O.S.A. – Order of Saint Augustine (Augustinians)

O.S.B. – Order of Saint Benedict (Benedictines)

PEM – Le Petit Episcopologe

P.I.M.E. – Pontifical Institute of Foreign Missions

P.M.E. – Society of Foreign Missions

P.S.S. – Society of Priests of Saint Sulpice (Sulpicians)

S.C. – Congregation of Servants of Charity

S.C.J. – Congregation of the Sacred Heart of Jesus (Timon David Fathers)

S.D.B. – Salesians of Saint Don Bosco (Salesians)

S.D.S. – Society of Divine Vocations (Vocationists)

S.F.M. – Scarboro Foreign Mission Society

S.J. – Society of Jesu (Jesuits)

S.M.B. – Society of Bethlehem Mission Immensee

S.S.C. – Society of Priests of Saint Joseph Benedict Cottolengo

SS.CC. – Congregation of the Sacred Hearts of Jesus and Mary (Picpus Fathers)

S.V.D. – Society of the Divine Word

S.X. – Xaverian Missionary Fathers

Tit. - Titular

T.O.R. - Third Order Regular of Saint Francis