What is a difference between orientation and socialization?

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Orientation is a set of activities to introduce company members and policy; socialization is an ongoing process to learn company culture.

Orientation is an annual event for all employees as part of the performance review process; socialization is the use of social activities for team building with new hires.

Orientation is an introductory meeting for new hires; socialization is the use of social activities for team building with all employees.

Orientation is an ongoing process to learn company policy; socialization is an event for new hires to meet the leadership.