| 12N | Twelve Newtons | |
| 12N | 1 thing 2 cents | |
| 1st | First | |
| 1ST | 1 term office of educational institutions | |
| 2708-0684 | Electronic journal of university of aden for basic and applied sciences | |
| 2FN | Two Fantastic Nebulae | |
| 2nd | Second | |
| 3GIO | Third Geological Investigative Onset | |
| 3rd | Third | |
| 4 PDTC | 4 Pole Double Throw Relay Model | |
| 4EA | Embodied, Embedded, Enacted, Extended, Affective | |
| 4N6 | Forensics | |
| 4th | Fourth | |
| 6D | Six-Dimensional | |
| 7MH | Seven Milhenries | |
| 8D | Eight-Dimensional | |
| 9D | Nine-Dimensional | |
| A | Blood Type | |
| A | Atomic | |
| A | Active | |
| A | Analysis | |
| A | Absolute | |
| A | Analog | |
| A&S | Arts and Sciences | |
| A.D |
Analogue to Digital |
| A/A/O | Anaerobic/Anoxic/Oxic | |
| A21 | Abolishing injustice in the 21st Century | |
| AA | Astronomy and Astrophysics | |
| AA | American Ancestry | |
| AA | Article Adjective | |
| AA | Amelia Academy | |
| AA | Avengers Academy | |
| AA | Academic Achievement | |
| AA-AAS | Alternate Assessment based on Alternate Achievement Standards | |
| AAA | Atlanta Adventist Academy | |
| AAA | Associate of Applied Arts | |
| AAAA | American Academy of Anesthesiologist Assistants | |
| AAAAI | American Academy of Allergy Asthma and Immunology | |
| AAAAI | American Academy of Allergy Asthma Immunology | |
| AAAAI | American Academy of Allergy, Asthma & Immunology | |
| AAAAM | American Academy of Anti Aging Medicine | |
| AAAAM | Academy of Aesthetic and Anti Aging Medicine | |
| AAAB | Asian Academy of Applied Business | |
| AAAC | Admissions and Academic Appeals Committee | |
| AAAC | American Academy of Ambulatory Care | |
| AAAD | Academy of Arts Architecture and Design | |
| AAAD | Asian Academy of Aesthetic Dentistry | |
| AAAD | Academy of Art Architecture and Design | |
| AAAD | Academy of Arts, Architecture and Design | |
| AAAD | Aditya Academy of Architecture Design |
| AAAF | American Academy of Applied Forensics | |
| AAAG | Academic Accessibility Advisory Group | |
| AAAG | Academic Affairs Advisory Group | |
| AAAGP | Australian Association of Academic General Practitioners | |
| AAAL | American Academy of Appellate Lawyers | |
| AAAL | Alberta Association of Academic Libraries | |
| AAAL | American Academy of Arts and Letters | |
| AAAOM | American Academy of Acupuncture and Oriental Medicine | |
| AAAP | Association of Administrators in Academic Pediatrics | |
| AAAP | American Academy of Addiction Psychiatry | |
| AAAS | American Academy of Arts and Sciences | |
| AAAS | American Association for the Advancement of Science | |
| AAAS | American Association in Advancement of Sciences | |
| AAAS | Accreditation Accountability and Academic Services | |
| AAATP | American Academy of Accounting Tax Professionals | |
| AAB | Academic Achievement Battery | |
| AAB | Academic Affairs Board | |
| AABC | American Academy of Biblical Counselors | |
| AABP | American Academy of Behavioral Psychology | |
| AABS | Association for the Advancement of Biodiversity Science | |
| AABS | Annals of Applied Bio Sciences | |
| AABSS | American Association of Behavioral and Social Sciences | |
| AABSS | Australian Academy of Business and Social Sciences | |
| AAC | Academy for Architectural Culture | |
| AAC | Art Academy of Cincinnati |
