B4, B04, B.IV or B-4 may refer to.
An interbank network, also known as an ATM consortium or ATM network, is a computer network that enables ATM cards issued by a financial institution that is a member of the network to be used to perform ATM transactions through ATMs that belong to another member of the network.
The Long March 4B, also known as the Chang Zheng 4B, CZ-4B and LM-4B is a Chinese orbital carrier rocket.
Minu väike paradiis is the second album by Estonian rock band Terminaator, released in 1995.
Oflag IV-B Koenigstein was a Nazi POW camp for Allied officers during World War II.
Stalag IV-B was one of the largest prisoner-of-war camps in Germany during World War II.