| Abbreviation | Description |
| A/CHMN | Acting Chairman |
| A/CHMN (Canadian War Mission) | Acting Chairman (Canadian War Mission) |
| A/COMNR | Acting Commissioner |
| A/HC | Acting High Commissioner |
| A/PERM DEL | Acting Permanent Delegate |
| A/PERM OBS | Acting Permanent Observer |
| A/REP | Acting Representative |
| Advisory Officer | Advisory Officer |
| AE&P | Ambassador Extraordinary and Plenipotentiary |
| AGENT | Agent |
| AMB | Ambassador |
| AMB & ALT PERM REP | Ambassador and Alternate Permanent Representative |
| AMB & DEP PERM REP | Ambassador and Deputy Permanent Representative |
| AMB & HOD | Ambassador and Head of Delegation |
| AMB & PERM DEL | Ambassador and Permanent Delegate |
| AMB & PERM OBS | Ambassador and Permanent Observer |
| AMB & PERM REP | Ambassador and Permanent Representative |
| C | Career |
| CG | Consul - General |
| Chargé d'Affaires a.i. | Chargé d'Affaires ad interim |
| Chargé d’Affaires e.p. | Chargé d’Affaires en pied |
| CHMN | Chairman |
| CHMN (Canadian War Mission) | Chairman (Canadian War Mission) |
| COMNR | Commissioner |
| COMNR GEN | Commissioner General |
| DEP PERM REP | Deputy Permanent Representative |
| DEPUTY PERM DEL | Deputy Permanent Delegate |
| EEMP | Envoy Extraordinary and Minister Plenipotentiary |
| HC | High Commissioner |
| HOD | Head of Delegation |
| HOM | Head of Mission |
| MIN & PERM DEL | Minister and Permanent Delegate |
| NC | Non-career |
| OBS | Observer |
| PERM DEL | Permanent Delegate |
| PERM OBS | Permanent Observer |
| PERM REP | Permanent Representative |
| REP | Representative |
| ROV AMB | Roving Ambassador |
| SEC'TY AND OFFR I/C PERM DEL | Secretary and Officer-in-Charge Permanent Delegation |
| SECTY AND OFFR I/C PERM DEL | Secretary and Officer-in-charge Permanent Delegation |