| Category | Contains the number of abbreviations |
|---|---|
| African | 2019 |
| Airport Codes | 17498 |
| Alaska | 321 |
| Australian | 1867 |
| British | 451 |
| Canadian | 1745 |
| Cities | 210 |
| Counties | 1262 |
| Countries | 656 |
| Currencies | 387 |
| European | 2720 |
| Ghana | 502 |
| India States | 43 |
| Irish | 154 |
| Language Codes (2 Letters) | 174 |
| Language Codes (3 Letters) | 694 |
| Railroads | 8461 |
| Scottish | 114 |
| States | 553 |
| Telephone Country Codes | 2 |
| Time Zones | 285 |
| ZIP Codes | 6 |