A shared field is one that shares a field caption and/or pick list with another field. Below is a list of shared fields in the Defaults tab.
Field Name  | 
Shared Modules  | 
Department  | 
Work (Work Orders, Planning-Department and Task modules, Requests, PM Template, Work Flow Setup-Classification, Employees, Equipment, Fluids, Materials, Problems, and Tasks)  | 
Division  | 
Work Orders  | 
Priority  | 
Work (Work Orders, Requests, PM Template, Problems, and the Tasks module)  |