I am in the technology sphere. So my world is constantly changing. As such I am always taking new classes to keep up with my industry. The most recent certification is one that I'm still in the middle of. My company Williams AV & Security is doing more commercial projects and in that sector of my industry the CTS (Certified Technology Specialist) designation is considered to be important. I have ordered and worked through the book. I have taken the prep class and and I am signed up to take my test next month. It has been a great refresher on many techniques and standards I already knew from my 30+ years in the industry. And I also learned many new things about project management. Next up will be my CTS-D and CTS-I (Designer and Installer designations respectively).