Here is a beautiful chart that visualizes the lines of code in various pieces of Software. Notable entries:
- Space Shuttle: 400k LoC
- formalmind Studio (with RMF): 600k LoC
- Boing 787: 14M LoC
- Windows XP and Windows 7: Both 40M LoC
- Modern Car: 100M LoC
- Mouse (the animal): 120M LoC