What is "b3"

n. A standard paper size, defined by ISO 216, with dimensions: 353 x 500 mm

B3, B03, B.III or B-3 may refer to:

B3 was an American pop boy band from New York. They were formed in 2001 and were first produced by O-Jay of German dance band Real McCoy. Original members were Timothy Andrew Cruz (2001–2004), John Steven Sutherland (2001–2004) and Rod Michael (2001–2002). When Michael left in 2002, Blair Madison Late (2002–2004) joined in. Tim Cruz was previously, in the late 1990s, a member of the boy band React.

B3 was best known in Germany and had most of their hits in the German charts. They remained active until 2004, also participating in the Four Seasons Tour in 2002. The band released three albums and had a number of singles. Their first album entitled First went gold in Germany. They also had a collaboration with singer Ji-In Cho who released a duet with B3. After the band split in December 2004, John Steven Sutherland and Tim Cruz went solo signing with Fearless Management.

B3 is a medical based Paralympic classification for blind sport. Competitors in this classification have partial sight, with visual acuity from 2/60 to 6/60. It is used by a number of blind sports including para-alpine skiing, para-Nordic skiing, blind cricket, blind golf, five-a-side football, goalball and judo. Some other sports, including adaptive rowing, athletics and swimming, have equivalents to this class.

The B3 classification was first created by the IBSA in the 1970s, and has largely remained unchanged since despite an effort by the International Paralympic Committee (IPC) to move towards a more functional and evidence-based classification system. Classification is often handled on the international level by the International Blind Sports Association (IBSA) although it is also handled by national sport federations. There are exceptions for sports like athletics and cycling.

Equipment utilized by competitors in this class may differ from sport to sport, and may include sighted guides, guide rails, beeping balls and clapsticks. There may be some modifications related to equipment and rules to specifically address needs of competitors in this class to allow them to compete in specific sports. Some sports specifically do not allow a guide, whereas cycling and skiing require one.

B3EP (often referred to as simply B3) is an EP by alternative rock band Placebo, released on 15 October 2012 through record label Vertigo.