| ABA | Applied Behaviour Analysis |
| A-B-C | Antecedent-Behaviour-Consequence |
| ABLLS-R | Assessment of Basic Language and Learning Skills (Revised) |
| ACSD | Assistance for Children with Severe Disabilities |
| ADOS | Autism Diagnostic Observation Schedule |
| AIP | Autism Intervention Program (2006-2017) |
| AO | Autism Ontario |
| AODA | Accessibility for Ontarians with Disabilities Act |
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| BACB | Behavior Analysis Certification Board |
| BCBA | Board Certified Behaviour Analyst |
| BCBA-D | Board Certified Behaviour Analyst – Doctoral |
| BCaBA | Board Certified Assistant Behaviour Analyst |
| BIP | Behaviour Intervention Plan (also known as BSP) |
| BSP | Behaviour Support Plan |
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| CDA | Communicative Disorders Assistant |
| CIC | Clinician-in-Charge (also known as Clinical Supervisor) |
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| DFO | Direct Funding Option (service option under the AIP or Liberal OAP/Legacy Program) |
| DSO | Direct Service Option (service option under the AIP or Liberal OAP/Legacy Program) or Developmental Services Ontario |
| DTC | Disability Tax Credit |
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| EA | Educational Assistant (may be called ERW or TA in other school boards) |
| ERW | Education Resource Worker (may be called EA or TA on other boards) |
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| FA | Functional Analysis |
| FBA | Functional Behaviour Assessment |
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| IBI | Intensive Behavioural Intervention (also known as comprehensive ABA) |
| IEP | Individual Education Plan |
| IPRC | Identification, Placement and Review Committee |
| ISP | Individual Service Plan/Individual Support Plan |
| IT | Instructor Therapist |
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| ND | Neurodivergent/Neurodiverse |
| NT | Neurotypical |
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| OAP | Ontario Autism Program |
| ODSP | Ontario Disability Support Program |
| OHRC | Ontario Human Rights Commission |
| OHRT | Ontario Human Rights Tribunal |
| OT | Occupational Therapist/Occupational Therapy |
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| PPM | Policy/Program Memorandum (i.e. PPM 140) |
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| RBT | Registered Behaviour Technician |
| RDSP | Registered Disability Savings Plan |
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| SEA | Special Equipment Amount |
| SEAC | Special Education Advisory Committee |
| SEG | Special Education Grant |
| SEPPA | Special Education Per Pupil Amount |
| SIP | Special Incidence Portion |
| SLP | Speech Language Pathologist |
| SNA | Special Needs Assistant (TDSB) |
| SSAH | Special Services At Home |
| ST | Senior Therapist |
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| TA | Teaching Assistant (may be called EA or ERW in other school boards) |
Peel Autism Resource 