Entity
Most information that historians work with comes from historical documents. Usually, the first step is to digitize the sources so that they are easier to work with. Often the next step is to identify bits of information like persons, events and places and map them so that you can ask questions like: Where was this person in the course of his life? or Who participated at an event?
For archaeologist the first step of workflow is to create a new Place and link subunits e.g. Feature and Stratigraphic unit to it. For a detailed workflow example see Archaeological data.
The Menu structure reflects that workflow.