What is the term used to describe education once a credential received?

There isn't one single universally accepted term for education *after* receiving a credential. The phrasing depends heavily on context. Here are some possibilities:

* Continuing education: This is a broad term encompassing any learning undertaken after formal schooling, often for professional development or personal enrichment.

* Professional development: This focuses specifically on learning aimed at improving skills and knowledge relevant to a profession.

* Graduate studies: If the further education involves postgraduate degrees (like Masters or PhD), this term is appropriate.

* Lifelong learning: This is a philosophical concept encompassing all learning throughout a person's life, regardless of credentials.

The best term to use will depend on the specific type of education being discussed.