Final answer:
The HR function comprising job orientation, training programs, and professional development is known as Training and Development. It helps new hires assimilate into the company culture and provides ongoing opportunities to enhance skills and support career advancement.
Step-by-step explanation:
The HR function that includes job orientation, training programs, and professional development is known as Training and Development. This process begins with an orientation period for new employees, where they learn about the company's history, policies, and culture.
Throughout their employment, individuals also receive job-specific training and development opportunities that are often formalized through presentations or group sessions. These training engage the employee in learning aspects of new duties or how to use new tools.