AABIC: Association for the Advancement of Brain Injured Children
AACN: American Academy of Clinical Neuropsychology
AACPDM: American Academy for Cerebral Palsy and Developmental Medicine
AAIDD: American Association on Intellectual and Developmental Disabilities
AAMR: American Association on Mental Retardation
AAN: American Academy of Neurology
AANN: American Association of Neuroscience Nurses
AANOS: American Academy of Neurological and Orthopaedic Surgeons
AANP: American Association of Naturopathic Physicians
AANS: American Association of Neurological Surgeons
AAPSA: American Academy of Psychoanalysis
AASCIN: American Association of Spinal Cord Injury Nurses
AASCIPSW: American Association of Spinal Cord Injury Psychologists and Social Workers
AASH: American Association for the Study of Headache
ABCN: American Board of Clinical Neuropsychology
ABI: Acquired Brain Injury
ABI: Adaptive Brain Interfaces
ABNN: American Board of Neuroscience Nursing
ABNS: American Board of Neurological Surgery
ABOMBI: American Board of Minor Brain Injury
ABPN: American Board of Psychiatry and Neurology
ABPNS: American Board of Pediatric Neurological Surgery
ABPP: American Board of Professional Psychology

ABTA: American Brain Tumor Association
ACAMH: Association Child and Adolescent Mental Health
ACNP: American College of Neuropsychopharmacology
ACT: Adaptive Control of Thought
AD: Alzheimer's disease
ADD: Attention Deficit Disorder
ADHD: Attention Deficit / Hyperactivity Disorder
ADHD: Attention Deficit Hyperactivity Disorder
AES: American Epilepsy Society
AMA: American Medical Association
ANOCEF: Association des Neuro-OnCologues d'Expression Française
APOPIS: Abnormal proteins in the pathogenesis of neurodegenerative disorders
ATSS: Australasian Tuberous Sclerosis Society
BCN: Behavioral and Cognitive Neurosciences
BDNF: brain-derived neurotrophic factor
BSCS: Budapest Semester in Cognitive Science
BSI: Behavioural Science Institute