There are many official codenames for operation systems. For example, Mac OS 10.7 is Lion, Android 4.0 is Ice Cream Sandwich. But we have never heard of iOS codenames. TiPB reports that developer Steve Troughton-Smith has revealed what Apple's codenames are for each iOS version. Here they are:

• 1.0: Alpine (1.0.0 – 1.0.2: Heavenly)
• 1.1: Little Bear (1.1.1: Snowbird, 1.1.2: Oktoberfest)
• 2.0: Big Bear
• 2.1: Sugarbowl
• 2.2: Timberline
• 3.0: Kirkwood
• 3.1: Northstar
• 3.2: Wildcat (iPad only)
• 4.0: Apex
• 4.1: Baker
• 4.2: Jasper (4.2.5 – 4.2.10: Phoenix)
• 4.3: Durango
• 5.0: Telluride
• 5.1: Hoodoo