Which certifications in the corporate sector are more acceptable than others?

The Project Management Institute (PMI) project management professional (PMP) certification is widely recognized and accepted by US and international corporations. PMI also offers other types of project and program related certifications. Each requires education and experience along with passing a standardized test. After Certification, the PMP or other certification holder must complete additional education, training, and work requirements to maintain their certification. See http://www.PMI.org.

PMP seems the hottest.

Certifiable Lunacy has become a requirement for Congress.