Labeling frames

I could witness the move of the nucleus of one hive to the other from close up thanks to the beekeeper suit I wore. Now I noticed that each of the frames had a sign written with a red marker pen. I asked Timothy the beekeeper what it meant. It was his system for marking the function of the different frames. F stood for Foundation, S for Store and DB for Drone Base. I wasn’t far advanced in the knowledge of the Apiculture in our Apiary to fully understand the meaning, but there is always room for improvement on my part. It was time to take off the beekeeper's suit and go surf the internet.