| Key to Abbreviations |
|
| DR Ext | Doctoral/research universities-extensive |
| DR Int | Doctoral/research universities-intensive |
| MA I | Master's (comprehensive) colleges and universities I |
| MA II | Master's (comprehensive) colleges and universities II |
| BA LA | Baccalaureate colleges-liberal arts |
| BA Gen | Baccalaureate colleges-general |
| BA AA | Baccalaureate/associate's colleges |
| AA | Associate's colleges |
| Faith | Theological seminaries and other specialized faith-based institutions |
| Med | Medical schools and medical centers |
| Health | Other separate health-profession schools |
| Engr | Schools of engineering and technology |
| Bus | Schools of business and management |
| Art | Schools of art, music, and design |
| Law | Schools of law |
| Teach | Teachers colleges |
| Other | Other specialized institutions |
| Tribal | Tribal colleges |
|
| These categories were included in the 1994 classification: |
| Res I | Research universities I |
| Res II | Research universities II |
| Doc I | Doctoral universities I |
| Doc II | Doctoral universities II |
| BA I | Baccalaureate (liberal arts) colleges I (called baccalaureate colleges-liberal arts in 2000 classification) |
| BA II | Baccalaureate (liberal arts) colleges II (called baccalaureate colleges-general in 2000 classification) |