When scientists get them back to a lab or university, each new artifact is assigned a series of numbers and letters to identify the site where the item has come from. Along with this new number is all of the details that the scientists have measured and noted about an artifact.
The numbering system is a standard system used throughout the United States, and it is the Smithsonian Trinomial System (STS). For instance, in Colorado a newly found artifact is given this new number: 5TL3032
How is this Smithsonian Trinomial System number created you might ask? This Here is how it works.
5 is the fifth state in the United States in alphabetical order so it is 5; Five = Colorado (Alaska, Arkansas, California, Connecticut , Colorado (fifth)
TL is for the County the site is in. In this case it is Teller County.
3032 is a sequential number to that site. This is the 3,032 site discovered in Colorado. If a number follows the site number 3032, it identifies the individual artifact.
This numbering system is also a way to keep sites confidential and unknown to people who would raid these sites and carry off archaeological remains to be sold on Ebay or at other places. Archaeological sites must always be protected. Once an artifact is removed before a scientist can study its location, and how the artifact fits into the ground in relation to other remains (context), all of the information connected to the artifact is lost forever .