Bios or BIOS may refer to:

• English transliteration of the ancient Greek term for life, , giving rise to the common prefix bio-, as in biology
• BIOS, the Basic Input/Output System firmware of an IBM PC-compatible computer
• Informal abbreviation of Biographies, written accounts of people's lives
• Biological Innovation for Open Society (BIOS)
• British Institute of Organ Studies (BIOS)
• British and Irish Orthoptic Society (BIOS)
• Bermuda Institute of Ocean Sciences (BIOS)
• Bios (album), the third album by Costa Rican music group Gandhi
• BIOS Faction, in the Allegiance (video game)
• BIOS, the society journal of the Tri Beta society
• BIOS Centre for the Study of Bioscience, Biomedicine, Biotechnology and Society at the London School of Economics, United Kingdom

de:Bios fr:BIOS nl:Bios sk:Bios