- CDJO : Daniel J. O'Neill: Manuscripts
- GDJO : Daniel J. O'Neill: Photographs
- GDJO 1/01 B/W Print : Daniel J. O'Neill and Photographer Red Stiso in a gymnasium at West Point c1960s
- GDJO 1/01 B/W Print : Illuminating Engineering November News Fellows Group; photo by Hydro-Quebec Relations Publiques Service Cinema-Photo 1967
- GDJO 1/01 B/W Print : Illuminating Engineering November News Fellows - Accepting the Fellows Award; photo by Hydro-Quebec Relations Publiques Service Cinema-Photo 1967
- GDJO 1/02 Color Slides : Niagara Power Project Slide Show regarding the building of a hydraulic dam c1960s
- GDJO 1/03 B/W Prints : A group of men posed outside of a house, including Tom Farrell, B.K. Wincerter (?), and Daniel O'Neill [two scenes] c1960s
- GDJO 1/03 B/W Print : Notre Dame Engineering Class of 1926 – Joseph (Joe) Webber Quinlan, Thomas (Tom) W. Sheridan, Stanley Charles Boyle, Malcolm Francis Knaus, Daniel J. O'Neill, Harold J. (Hap) Kiley, Alton C. Velia, Eugene (Gene) F. McVeigh [not listed on GDJO 1/03], Carlton Ambrose Rogge, Norbin Edward Arehardt, Charles Emmett Mason, Joseph Vincent Soisson, Paul L. (Hal) Skelley, John Burton, Professor John A. Northcutt Jr., Dr. Jose A. Caparo, and Frank G. Mayer [same image as GNDL 31/31 with slightly different identifications; Professor C.P. Hafel and Professor Gyan Chan Sharma are not listed on GNDL 31/31] c1926
- GDJO 1/03 B/W Print : Football Game Scene - Army vs. Detroit c1920s
- GDJO 1/03 B/W Print : Three men standing outside 1927/1001
- GDJO 1/03 B/W Prints : Army West Point scenics c1920s
- GDJO 1/03 B/W Prints : Men posing outside of a house c1920s
- GDJO 1/03 B/W Prints : Men posing on the steps of Corby Hall c1920s
- GDJO 1/03 B/W Prints : Men posed individually outside in winter with snow, including in graduation cap and gown c1920s
- GDJO 1/04 B/W Slides : Photographs and documents regarding interior lighting of field-houses and basketball gymnasiums c1960s
- GDJO 1/05 B/W Print : Notre Dame Alumni Reunion - Class of 1926 on the steps of Bond Hall [see file for identifications] 1951/060
- GDJO 1/06 Color Prints : Notre Dame Alumni Reunion - Class of 1926 posed outside [two scenes] c1960s-1970
- GDJO 1/06 Color Print : Notre Dame Alumni Reunion - Class of 1926 posed outside 1982
- GDJO 1/06 Color Print : Notre Dame Alumni Reunion - Class of 1926 posed outside 1986/0621
- GDJO 1/07 B/W Print : Notre Dame Alumni Reunion - Class of 1926 posed outside of Haggar Hall c1960s-1970s
- GDJO 1/07 B/W Print : Notre Dame Alumni Reunion - Class of 1926 posed outside on the steps of Bond Hall c1960s-1970s
- ODJO : Daniel J. O'Neill: Objects