1987-1988

• Barney Operating System Beta Release (1987-1988)

1989-1992

• Barney Operating System Version 1.0 (1988)
• Barney Operating System Version 1.1 (1989)
• Barney Operating System Version 1.2 (1990)
• Barney Operating System Version 1.5 (1991-1992)

1992-1995

• Barney Operating System Version 2.0 (1992-1995)

1995-2001

• Barney Operating System 95 (1995-1997)
• Barney Operating System Version 3.0 (1995)
• Barney Operating System 98 (1998-1999)
• Barney Operating System 2000 (1999-2001)
• Barney Operating System ME (2000-2001)

2001-2006

• Barney Operating System XP (2001-2006)
• Barney Operating System Version 4.0 (2002)
• Barney Operating System Longhorn (2004-2006)

2006-2012

• Barney Operating System Vista (2006-2012)
• Barney Operating System Vienna (2008-2012)
• Barney Operating System Version 4.5 (2008)
• Barney Operating System Version 5.0 (2010)

2012-2021

• Barney Operating System Version 6.0 (2017)

2021-present