b4-4 later on Before Four (stylized as before four) was a Canadian boy band from Toronto, Ontario.
The B44 is a public transit line in Brooklyn, New York City, United States, running mostly along Nostrand Avenue, as well as northbound on Rogers Avenue or New York Avenue and Bedford Avenue (as part of a one-way pair), between Sheepshead Bay and Williamsburg.
The Boeing B-50 Superfortress is an American strategic bomber.
Bus rapid transit (BRT, BRTS, busway, transitway) is a bus-based public transport system designed to improve capacity and reliability relative to a conventional bus system.
HLA-B44 (B44) is an HLA-B serotype.
Select Bus Service (SBS; stylized on the buses as +selectbusservice) is a brand used by the Metropolitan Transportation Authority's MTA Regional Bus Operations for bus rapid transit service in New York City.
6Q0B44E, sometimes abbreviated to B44E, is a small object, probably an item of space debris, that is currently orbiting Earth outside the orbit of the Moon as of October 2016.