Login or register (free and only takes a few minutes) to participate in this question.
You will also have access to many other tools and opportunities designed for those who have language-related jobs (or are passionate about them). Participation is free and the site has a strict confidentiality policy.
No need for anyone to spend further time on this. I have seen and translated "DE" in this sense numerous times over the years and somehow just didn't think of it when it came up this time. Many thanks to Rita and Joseph for dealing so promptly with my memory failure today!
I'll leave points when the system allows me to, after the required 24 hours.
Martin, I hope you'll never again think of "impossibility' when searching for acronyms/abbreviations online. The resource that Rita posted is excellent and very comprehensive (even if it doesn't contain all possible abbreviations). Here are two more: