What do those abbreviations mean?
The letters indicate where the fossil was found:
| AL | Afar Locality, Ethiopia |
| BOU-VP | Bouri Vertebrate Paleontology, Ethiopia |
| ER | East (Lake) Rudolf, Kenya |
| KNM | Kenya National Museum (where fossil is on display) |
| KP | Kanapoi, Kenya |
| KT | Koro Toro, Chad |
| OH | Olduvai Hominid, Tanzania |
| SK | Swartkrans, South Africa |
| Sts | Sterkfontein type site, South Africa |
| WT | West (Lake) Turkana, Kenya |
The number of the fossil found at that site follows.
For instance, KNM-ER 3733 was the 3,733 specimen found in East Rudolf. It is on display at the Kenya National Museum.