The provided text outlines methods for identifying enterprise HR software usage across different companies, focusing specifically on major platforms like Workday, SAP SuccessFactors, and Oracle. It details how professionals can uncover these hidden technology stacks by utilizing browser extensions, LinkedIn profile mining, public records, and B2B technographic data. Furthermore, the source explains how to leverage this intelligence for targeted marketing, displacement campaigns, and personalized outreach. Finally, the guide highlights common challenges such as hybrid tech environments, custom-domain masking, and data decay when attempting to accurately map corporate software installations.