上面的大大答案是錯的!
WIndows 95 的開發代號才是"Chicago"

Product Codename
Windows 3.1 Janus
Windows for Workgroups 3.1 Kato
Windows for Workgroups 3.11 Snowball
Windows 95 Chicago
Windows 95B (OSR2) Detroit
Windows 98 Memphis
Windows ME Millennium
Windows NT 3.5 Daytona
Windows NT 4.0 Cairo
Windows 2000 Odyssey
Windows XP (ver 5.1.2600) Whistler
Windows Server 2003 Whistler Server
Windows Vista Longhorn
Windows product never released. Neptune (介於2000跟XP之間的暫時開發產物)