Library of Congress Subject Headings continue to change and evolve, sometimes in most interesting ways. New subject headings are published monthly, and, as well as signifying the essence of a topic, they can often serve as social commentary or as historical milestones. Here are a few recent ones, or ones that bear highlighting. We?ll continue to share more with you as we collect them.
Berkelium (May Subd. Geog.)
Free thought (May Subd. Geog.)
Middle class (May Subd. Geog.)
Optical antennas (Mat Subd. Geog.)
Plant luminescence (May Subd. Geog.)
Radio and television tower bird strikes (May Subd. Geog.)