Sourcing in personnel management refers to proactively identifying potential candidates through recruiting techniques. Historically, sourcing was the sole responsibility of recruiters, but it has grown into a specialized role. Sourcing involves identifying names, titles, and contact information of potential candidates through primary techniques like cold calling or secondary techniques like internet searches. Proactive sourcing seeks out passive candidates not actively job searching, while reactive sourcing reviews applicants from job boards or referrals. Sourcing is distinguished from candidate research and profiling. Specialized sourcers focus on internet research skills or sourcing diverse candidates.