B8

B8, B VIII or B-8 may refer to:

Roads

 * B8 (Croatia), an expressway part of the Istrian Y highway network
 * B8 road (Cyprus)
 * B8 road (Kenya)
 * B8 road (Namibia)
 * Bundesstraße 8, a road in Germany

Other uses in transport

 * B8 (New York City bus) serving Brooklyn
 * Bavarian B VIII, a German steam locomotive model
 * Bensen B-8, a 1955 United States small single-seat autogyro
 * HMS B8, a B-class submarine of the Royal Navy
 * Mazda B8, a piston engine
 * Fokker XB-8, a bomber prototype built for the United States Army Air Corps
 * B8, the IATA code for Eritrean Airlines
 * LNER Class B8, a class of British steam locomotives

Biology

 * Proanthocyanidin B8, a B type proanthocyanidin
 * Vitamin B8, a name sometimes used for inositol
 * HLA-B8, an HLA-B serotype

Other

 * B8 (bronze), an alloy used in cymbals
 * b8 (spam filter), a statistical spam filter implemented in PHP
 * Boron-8 (B-8 or 8B), an isotope of boron
 * B8, a type of stereoautograph
 * A subclass of B-class stars
 * An international standard paper size (62×88 mm), defined in ISO 216
 * The musical note 7 keys above a standard Grand Piano
 * The postcode for Saltley, England
 * B8, the category for warehousing under the United Kingdom planning regulations
 * B-VIII reactor, an unsuccessful experiment that was part of the German nuclear weapons program