| AAGRA | Australasian Assoc of Genealogists & Record Agents |
| Admons | Letters of Administration (mainly for those who don't leave wills) |
| ABGR | Australian Biographical Genealogical Register (published books) |
| AFFHO | Australasian Federation of Family History Organisations |
| AFTC | Australian Family Tree Connection (magazine) |
| Ag lab | Agricultural labourer |
| AGCI | Australian Genealogical Computer Index (for various Australian genealogical societies) |
| AGRA | Assoc of Genealogists & Record Agents (England) |
| AIGS | Australian Institute of Genealogical Studies (Melbourne) |
| AJCP | Australian Joint Copying Project |
| AOT | Archives Office of Tasmania |
| APG | Association of Professional Genealogists |
| AQ | Ancestral Quest (genealogical software) |
| AWM | Australian War Memorial |
| b | born |
| bap /chr | baptised / christened |
| BDM / BMD | Births, Marriages and Deaths (civil certificates) |
| BigR | British Isles Genealogical Register |
| BK | Brother's Keeper (genealogical software) |
| BL | British Library |
| BTs | Bishops' Transcripts (of parish registers) |
| c or circa | approximately |
| CRO | County Record Office (UK) |
| CWGC | Commonwealth War Graves Commission |
| d | died |
| dob / dod | Date of Birth / Date of death |
| DPS | Dead Persons Society (Genealogists who use computers) |
| FamilySearch | family history section of LDS church |
| FFHC | Federation of Family History Societies (England) |
| FH | Family Historian (genealogical software) |
| FHC / FHL | Family History Centre / Family History Library (of LDS church) |
| FHS | Family History Society |
| FRC | Family Records Centre (now GRO, London) |
| FTM | Family Tree Magazine (magazine - UK & US each have their own) |
| FTM | Family Tree Maker (genealogical software) |
| GEDCOM | GEnealogical Data COMmunications (a file format for transferring family history data) |
| GENUKI | Genealogy website, portal to UK & Ireland information |
| GOONS | Guild of One Name Studies |
| GRD | Genealogical Research Directory |
| GRO | General Register Office (responsible for BDMs for England & Wales) |
| GSNT | Genealogical Society of Northern Territory (Darwin) |
| GSQ | Genealogical Society of Queensland (Brisbane) |
| GSV | Genealogical Society of Victoria (Melbourne) |
| GUM | Genealogists Using Microcomputers (Melbourne) |
| HAGSOC | Heraldry & Genealogy Society of Canberra |
| IGI | International Genealogical Index (developed by LDS, mainly baptisms and marriages & also researcher submissions) |
| IHGS | Institute of Heraldic & Genealogical Studies |
| instant. | of the current month ('of the 13th instant') |
| IRC | International Reply Coupon (from post office, redeemable for postage stamps in any country) |
| ISBN | International Standard Book Number |
| JCP | Joint Copying Project (project copying Parish Registers by SAG & State Library of NSW) |
| LDS | Church of Jesus Christ of Latter-day Saints (Mormons, have religious obligation to research their ancestors) |
| LMA | London Metropolitan Archives |
| m | married |
| MFT | MacFamily Tree (genealogical software) |
| MI | Monumental Inscription (on tombstones) |
| NAA | National Archives of Australia |
| NAS | National Archives of Scotland (Edinburgh) |
| NLA | National Library of Australia |
| NLNZ | National Library New Zealand |
| NLS | National Library of Scotland |
| NRAM | National Register of Archives and Manuscripts (New Zealand) |
| NRH | New Register House (Edinburgh, centre for Scottish BDM certificates & census) |
| NTAS | Northern Territory Archives Service |
| NZSG | New Zealand Society of Genealogists |
| ONS | Office of National Statistics (UK) |
| OPR | Old Parish / Parochial Registers (Scottish, before civil registration) |
| PAF | Personal Ancestral File (Genealogical Software from LDS church) |
| PR | Parish Registers (church records, mainly baptisms, marriages & burials) |
| PRO | Public Record Office |
| PROV | Public Record Office of Victoria |
| QFHS | Queensland Family History Society (Brisbane) |
| QSA | Queensland State Archives |
| RY3 | Relatively Yours 3 (genealogical software) |
| SAE / SSAE | Self Addressed Envelope / Stamped Self Addressed Envelope |
| SAG | Society of Australian Genealogists (Sydney) |
| SAGHS | South Australian Genealogy & Heraldry Society (Adelaide) |
| SCAN | Scottish Archives Network |
| SLC | Salt Lake City (Utah, headquarters of the Church of Jesus Christ of Latter Day Saints) |
| SLNSW | State Library New South Wales |
| SLQ | State Library Queensland |
| SLSA | State Library South Australia |
| SLV | State Library Victoria |
| SLWA | State Library Western Australia |
| SNP | Single Nucleotide Polymorphism (pronounced 'snip', a DNA sequence variation) |
| SoG | Society of Genealogists (London) |
| SRNSW | State Records NSW (state archives) |
| SROWA | State Records of Western Australia (state archives) |
| SRSA | State Records of South Australia (state archives) |
| St Caths | St Catherine's House (formerly Civil Registration centre for England & Wales, now known as GRO |
| STR | Short Tandem Repeats (DNA regions with short repeat units) |
| TFHS | Tasmanian Family History Society |
| TMG | The Master Genealogist (genealogical software) |
| TNA | The National Archives (Kew, London) |
| URL | Unique Record Locator (website address) |
| UTP | Unlock the Past |
| VAFHO | Victorian Association of Family History Organisations |
| WAGS | Western Australian Genealogical Society |