8B

8B or VIII-B may refer to :
 * AV-8B Harrier II, an aircraft
 * Stalag VIII-B, a notorious German Army prisoner of war camp near Lamsdorf
 * Caribbean Star Airlines IATA airline designator
 * 8b/10b encoding or 6b/8b encoding, in telecommunications, eight bit words
 * Bone morphogenetic protein 8b
 * Van Biesbroeck 8b, a brown dwarf star
 * WASP-8b, an extrasolar planet discovered in 2008
 * GCR Class 8B, a class of 25 two-cylinder steam locomotives
 * WNT8B, a protein that in humans is encoded by the WNT8B gene
 * Boeing XF8B, a single-engine aircraft developed by Boeing
 * PDE8B, is an enzyme that in humans is encoded by the PDE8B gene
 * HAT-P-8b, an extrasolar planet
 * Isotta Fraschini Tipo 8B, an Italian luxury car made between 1931 and 1934
 * Boron-8 (8B), an isotope of boron