| CODE | DESIGNATION | CODE | DESIGNATION | |
| 010 | AGRICULTURE | 135 | NATIVE AMERICAN | |
| 020 | ARCHEOLOGY | 136 | OTHER | |
| 021 | PREHISTORIC ARCHEOLOGY | 140 | EXPLORATION/SETTLEMENT | |
| 022 | HISTORIC - ABORIGINAL | 150 | HEALTH/MEDICINE | |
| 023 | HISTORIC - NON-ABORIGINAL | 160 | INDUSTRY | |
| 030 | ARCHITECTURE | 170 | INVENTION | |
| 040 | ART | 180 | LANDSCAPE ARCHITECTURE | |
| 050 | COMMERCE | 190 | LAW | |
| 060 | COMMUNICATIONS | 200 | LITERATURE | |
| 070 | COMMUNITY PLANNING AND DEVELOPMENT | 210 | MARITIME HISTORY | |
| 080 | CONSERVATION | 220 | MILITARY | |
| 090 | ECONOMICS | 230 | PERFORMING ARTS | |
| 100 | EDUCATION | 240 | PHILOSOPHY | |
| 110 | ENGINEERING | 250 | POLITICS/GOVERNMENT | |
| 120 | ENTERTAINMENT/RECREATION | 260 | RELIGION | |
| 130 | ETHNIC HERITAGE | 270 | SCIENCE | |
| 131 | ASIAN | 280 | SOCIAL HISTORY | |
| 132 | BLACK | 290 | TRANSPORTATION | |
| 133 | EUROPEAN | 300 | OTHER | |
| 134 | HISPANIC |