What does Yb stand for?

Ytterbium - Chemical element

Hyannis Aviation - ICAO designator (AD)

Meteorological Operational Telecommunications Network Europe - ICAO designator (ICDA)

Yard Bird - Confined to camp - Military slang

Yearbook

Yearbook of the European Convention on Human Rights - A publication (SAFN)

Yellow Brass (UWER)

Yellowish Brown - Soil biology - Soil color (QSUL)

Yellowknife Bear Resources, Inc. - Toronto Stock Exchange symbol

Yeshiva Benarroch. Tetuan (BJA)

Yoon Band (Fallope ring) - Medicine (EDAA)

Yottabyte - Telecommunications (ACOL)

Youngstown Belt Railroad - Federal Railroad Administration identification code

Your Business - A publication

Youth Brigade - Australia

Youth Bureau - Australia