S40
S40 stands for:
- HMS Upholder (S40) , Victoria-class long-range hunting submarine of the Royal Navy of Great Britain
- Volvo S40 , two car series
- Nokia Series 40 , a cell phone operating system
- Franz-Josefs-Bahn (S40) , an S-Bahn line between Vienna and St. Pölten
S-40 stands for:
- Sikorsky S-40 , a four-engine flying boat from the 1930s
