OSB may refer to: OSB, Amtrak station code for the Old Saybrook station in Connecticut, United States Oklahoma School for the Blind OSBINDIA Pvt Ltd, a UK registered subsidiary bank that operates under the trade name OSB Group OneSavings Bank plc, a UK registered bank that operates under the trade name Kent Reliance Open Source Business Alliance, sometimes known as OSB Alliance Operation Smiling Buddha, code name for India's first successful test explosion of a nuclear bomb (1974) Operation Sovereign Borders, Australian border security operation Oracle Service Bus, Oracle's enterprise service bus Oregon State Bar, public body that regulates the legal profession in Oregon, United States Oriented strand board, an engineered wood Orquestra Sinfônica Brasileira, in English the Brazilian Symphony Orchestra) Christianity Order of Saint Benedict, Catholic monastic order Order of St Benedict (Anglican), Anglican monastic order Order of Saint Benedict (Orthodox), Orthodox monastic order Orthodox Study Bible, Eastern Orthodox Bible in English that includes the Septuagint