Recruitment involves developing and maintaining a pool of available labor for an organization to draw from when additional employees are needed. Organizations recruit from both internal and external sources. Internal sources include promotion, transfer, past employees, and internal advertisements. External sources are recruitment from outside the company through means such as advertisements, employment exchanges, private agencies, campus recruitment, and walk-ins. The selection process involves matching job requirements to candidate skills through steps like notification of openings, preliminary interviews, tests, employment interviews, selection, medical examination, and appointment with an offer letter.