- Church buildings1,991
- Basketball1,902
- Fairs1,882
- Fairgrounds1,845
- Amateur radio stations1,821
- Lecture halls1,805
- Lost architecture1,799
- Agricultural extension workers1,713
- Engineers1,645
- Nuclear reactors1,620
- Forestry laboratories1,609
- Animal science1,528
- School buildings1,409
- College students -- Societies, etc.1,360
- Animal protection1,310
- Forest management1,262
- Agricultural education1,227
- Forests and forestry1,193
- Demolished buildings1,136
- Windows1,136