I had my Costoc audiologist email me my test, and her signature section on the bottom of the email had all her qualifications listed, one of which was a Diploma in HDPE, which I could only discover meant High Density Poly Ethylene! I guess in the audiology world is must mean something else. My wife thinks it could be that plastic foam they squirt in my ears to take an impression for my CIC aids
I suspect if I looked she probably also had her qualifications hanging on a wall as well - will check it out tomorrow when I go to get my er impressions done.