Abbreviations and Acronyms are defined in the Baseline Requirements except as otherwise defined herein:
| BIPM | International Bureau of Weights and Measures |
| BIS | (US Government) Bureau of Industry and Security |
| CEO | Chief Executive Officer |
| CFO | Chief Financial Officer |
| CIO | Chief Information Officer |
| CISO | Chief Information Security Officer |
| COO | Chief Operating Officer |
| CPA | Chartered Professional Accountant |
| CSO | Chief Security Officer |
| EV | Extended Validation |
| gTLD | Generic Top-Level Domain |
| IFAC | International Federation of Accountants |
| IRS | Internal Revenue Service |
| ISP | Internet Service Provider |
| QGIS | Qualified Government Information Source |
| QTIS | Qualified Government Tax Information Source |
| QIIS | Qualified Independent Information Source |
| SEC | (US Government) Securities and Exchange Commission |
| UTC(k) | National realization of Coordinated Universal Time |