Rank | Abbreviation | Meaning |
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***** | CTAO | Cardiology Technologists Association of Ontario
| |
**** | CTAO | Corporate Tax Administration for Ontario
| |
**** | CTAO | Canadian Tibetan Association of Ontario
| |
**** | CTAO | County Treasurers Association of Ohio
| |
**** | CTAO | Coming Together as One
| |
**** | CTAO | Cultural and Tourism Affairs Office
| |
*** | CTAO | Center for Theoretical and Applied Ontology
| |
*** | CTAO | Cardiovascular Technology Association of Ontario
| |
*** | CTAO | Centre for Theoretical and Applied Ontology
| |
** | CTAO | Clinical Trials Administration Office
| |
** | CTAO | Cape Town Advice Office
| |
* | CTAO | Cairn Terrier Association of Ontario
| |
* | CTAO | Call Transfer Attendant Only
| |