List of Microsoft codenames
Windows NT family

List of Microsoft codenames

Section Title: Windows NT family
Table Section Text: None

Codename	Preliminary name	Final name	Notes

Razzle	NT OS/2	Windows NT	N/A

Daytona	N/A	Windows NT 3.5	Named after the Daytona International Speedway in Daytona Beach, Florida.

SUR (Shell Update Release), Cairo	N/A	Windows NT 4.0	Microsoft originally planned for NT 4.0 to be just a simple "Shell Update Release" to integrate the Windows 95 GUI with Windows NT 3.51's kernel.

Wolfpack	N/A	Microsoft Cluster Server	N/A

Janus	NT 5.0	Windows 2000 64-bit	Windows 2000 did not have a codename because, according to Dave Thompson of Windows NT team, "Jim Allchin didn't like codenames".

Impala	N/A	Windows NT 4.0 Embedded	N/A

Neptune	N/A	Dropped	Planned consumer version of Windows 2000, merged with Odyssey to form Whistler.

Odyssey	N/A	Dropped	Planned successor to Windows 2000 for business customers, merged with Neptune to form Whistler.

Whistler	N/A	Windows XP	Named after Whistler Blackcomb, where design retreats were held.

Mantis	N/A	Windows XP Embedded	Named after the Mantis shrimp

Freestyle	N/A	Windows XP Media Center Edition	N/A

Harmony	N/A	Windows XP Media Center Edition 2004	N/A

Symphony	N/A	Windows XP Media Center Edition 2005	N/A

Emerald	N/A	Windows XP Media Center Edition 2005 Update Rollup 2	N/A

Diamond	N/A	Windows Media Center	Included in Windows Vista

Springboard	N/A	N/A	Set of enhanced security features, included in Windows XP Service Pack 2.

Lonestar	N/A	Windows XP Tablet PC Edition 2005	N/A

Whistler Server	Windows Server 2002, Windows .NET Server	Windows Server 2003	N/A

Bobcat	N/A	Windows Small Business Server 2003	Not to be confused with Microsoft Bob.

Eiger, Mönch	N/A	Windows Fundamentals for Legacy PCs	Mönch included additional features for use on mobile devices.

Longhorn	N/A	Windows Vista	Named after the Longhorn Bar in the Whistler Blackcomb ski resort; initially planned as an "interim release" between "Whistler" and "Blackcomb" (see below)

Q, Quattro	N/A	Windows Home Server	N/A

Vail	N/A	Windows Home Server 2011	N/A

Longhorn Server	N/A	Windows Server 2008	N/A

Cougar	N/A	Windows Small Business Server 2008	N/A

Centro	N/A	Windows Essential Business Server	N/A

Blackcomb, Vienna	N/A	Windows 7	"Blackcomb" is named after Whistler Blackcomb ski resort. Vienna is the capital of Austria.

Fiji	Windows Vista Media Center Feature Pack 2008	Windows Media Center TV Pack 2008	N/A

Aurora	N/A	Windows Small Business Server 2011 Essentials	N/A

Quebec	N/A	Windows Embedded 2011	N/A

Windows Server 8	N/A	Windows Server 2012	N/A

Blue	N/A	Windows 8.1	N/A

Threshold	N/A	Windows 10 RTM and 1511	Named after a location seen in Halo: Combat Evolved, near which Installation 04 orbits.

Redstone	N/A	Windows 10 versions 1607, 1703, 1709, 1803 and 1809	Named after a fictional mineral from Minecraft.

Sentence(s)

Neptune was the codename for a version of Microsoft Windows.

final_sentence: Neptune was the codename for a version of Microsoft Windows.