Here are the abbreviations excluding the Bible books.
AA - Apostolicam Actositatem - also known as the "Decree on the Apostolate of the Laity", is one of the 16 magisterial documents of the Second Vatican Council. (More info)
AAS - Acta Apostolicae Sedis - (Latin for "Acts of the Apostolic See") is the official gazette of the Holy See, appearing about twelve times a year. (More info)
AF - J.B. Lightfoot, ed., The Apostolic Fathers (New York: Macmillan, 1889-1890)
AG - Ad Gentes - (To the Nations) is the Second Vatican Council's decree on missionary activity. (More info)
Ben - de Benedictionibus - Contains the norms and rites for blessings and sacramentals as reformed after the Second Vatican Council. (View the Latin Book)
CA - Centesimus Annus - (Latin for "the hundredth year") is an encyclical which was written by Pope John Paul II in 1991 on the hundredth anniversary of Rerum novarum, an encyclical issued by Pope Leo XIII in 1891. It is part of a larger body of writings, known as Catholic social teaching, which trace their origin to Rerum novarum and aim to relate the teachings of Jesus to the industrial age. (More info)
Catech. R. - Catechismus Romanus - The Roman Catechism or Catechism of the Council of Trent is a compendium of Catholic doctrine commissioned during the Counter-Reformation by the Council of Trent, to expound doctrine and to improve the theological understanding of the clergy. It was published in 1566. (More info)
CCEO - Corpus/Codex Canonum Ecclisarum Orientalium - The Code of Canons of the Eastern Churches is the title of the 1990 work which is a codification of the common portions of the canon law for the 23 Eastern Catholic Churches in the Catholic Church. (More info)
CCL - Corpus Christianorum, Series Latina (Turhout, 1953- ) - The Corpus Christianorum (CC) is a major publishing undertaking of the Belgian publisher Brepols Publishers devoted to patristic and medieval Latin texts. (More info)
CD - Christus Dominus (Christ the Lord; abbreviation "CD") is the Second Vatican Council's "Decree on the Pastoral Office of Bishops". (More info)
CDF - Congregation for the Doctrine of the Faith (Vatican)
CELAM - Consejo Episcopal Latinoamericano - Latin American and Caribbean Episcopal Council
CIC - Codex Iuris Canonici - Code of Canon Law (Vatican) - The canon law of the Catholic Church ("canon law" comes from Latin ius canonicum) is "how the Church organizes and governs herself". (More info)
CL - Christifideles laici (Ecclesiastical Latin: [kristifiˈdeles ˈla.itʃi]) is a post-synodal apostolic exhortation of Pope John Paul II, signed in Rome on December 30, 1988. (More info)
COD - Conciloirum oecumenicorum decreta (Decrees of the Ecumenical Councils) - Contains "the texts of the decrees of the first seven ecumenical councils, the anti-Photian Fourth Council of Constantinople, the five Lateran councils, the two Coucils of Lyon, and those of Vienne, Konstanz, Basel-Florence, Trent and the First Vatican Council (1870) (View the Latin book)
CPG Solemn Profession of faith: Credo of the People of God
CSEL Corpus Scriptorum Ecclesiasticorum Latinorum (Vineea, 1866- )
CT Catechesi tradendae
DeV Dominum et Vivificanum
DH Dignitatis humanae
DM Dives in misericordia
DS Denzinger-Schonmetzer, Enchiridion Symbolorum, definitionum et declarationum de rebus fidei et morum (1965)
DV Dei Verbum
EN Evangelii nuntiandi
EP Eucharistic Prayer
FC Familiaris consortio
GCD General Catechetical Directory
GE Gravissimum educationis
GILH General Introduction to LH
GIRM General Instruction to RomM
GS Gaudium et spes
HV Humanae vitae
ICEL International Commission on English in the Liturgy
IM Inter mirifica
LE Laborem exercens
LG Lumen gentium
LH Liturgy of the Hours
LXX Septuagint
MC Marialis cultus
MD Mulieris dignitatem
MF Mysterium fidei
MM Mater et magistra
NA Nostra aetate
NCCB National Conference of Catholic Bishops (U.S.A.)
ND Neuner-Dupuis, The Christian Faith in the Doctrinal Documents of the Catholic Church
OBA Ordo baptismi adultorum
OC Ordo confirmarionis
OCF Order of Christian Funerals
OCM Ordo celebrandi Matrimonium
OCV Ordo consecrarionis virginum
OE Orientalium ecclesiarum
OP Ordo paenitantiae
OR Office of Readings
OT Optatam totius
PC Perfectae caritatis
PG J.P. Migne, ed., Patroligia Greaca (Paris, 1867-1866)
PL J.P. Migne, ed., Patroligia Latina (Paris, 1841-1855)
PLS J.P. Migne, ed., Patroligia Latina Supplement
PO Presbyterorum ordinis
PP Populorum progressio
PT Pacem in terris
RBC Rite of Baptism of Children
RCIA Rite of christian initiation of adults
RH Redemptor hominis
RomM Roman Missal
RMat Redemptoris Mater
RMiss Redemptoris Missio
RP Reconciliatio et paenitentia
SC Sacrosanctum concilium
SCG Summa Contra Gentiles
SCh Sources Chretiennes (Paris: 1942- )
SRS Sollicitudo rei socialis
STh Summa Theologiea
UR
Unitatis redintegratio
'In faith there is enough light for those who want to believe
and enough shadows to blind those who don't.'
- Blaise Pascal