5. The process of establishing and maintaining contacts with key managers in your own and other organizations, and using those contacts to weave strong relationships that serve as informal development systems is called

networking.

Explanation:

Networking is defined as the process of creating a network of contacts that can be beneficial to an individual's professional life.

This form of relationship is widely used in the professional field, and can confer advantages in helping professional development, obtaining relevant information, the opportunity to get a new job, etc.

It is an interesting way to establish and maintain interpersonal relationships, as long as they are strongly based on ethics, obtaining a solid base of relationships with co-workers will bring significant benefits to an individual's career.