S3

S3 or S-3 may refer to:

Film

• Superman III
• S3 Films

Transportation

Aviation

• Santa Barbara Airlines IATA airline designator
• S03, Ashland Municipal Airport FAA LID

Locomotives

• North Eastern Railway Class S3, a steam locomotive
• Prussian S 3, a steam locomotive

S-Bahn lines

• S3 (Berlin), a S-Bahn line
• a planned Bremen S-Bahn line
• S3 (Dresden), a S-Bahn line
• a Hamburg S-Bahn line
• a Hanover S-Bahn line
• a Nuremberg S-Bahn line
• a RheinNeckar S-Bahn line
• a Rhein-Ruhr S-Bahn line
• a Rhine-Main S-Bahn line
• a Rostock S-Bahn line
• a Stuttgart S-Bahn line
• a Zürich S-Bahn line

Cars

• Audi S3

Roads

• County Route S3 (California), a county route in California

Military

• S3 (military), the operations officer in military units
• S-3 Viking, an airplane
• S3 ICBM, a French nuclear missile now out of commission
• USS S-3 (SS-107), a US Navy submarine
• Norrlands signalregemente, a Swedish regiment

Computers

• S3 Graphics, a computer hardware company
• S3 Texture Compression
• Amazon S3, an online data storage service
• S3 (programming language), a language used to write the VME operating system and much other system software on the ICL 2900 Series
• S3, a standby mode an ACPI-compliant computer can be in. It is more formally called ACPI S3
• S3 Matching Technologies, a data quality management software company
• S3 Plan, a fictitious program in the Metal Gear Solid 2: Sons of Liberty video game

Electronics

• Canon PowerShot S3 IS, a 2006 6.0 megapixel digital camera
• FinePix S3 Pro, a 2004 interchangeable lens digital single-lens reflex camera by Fujifilm
• Nikon S3, a 1953 35 mm film camera
• Nikon Coolpix S3 a 6 million pixels digital camera
• Siemens S3, a Siemens mobile phone
• S03 (Yamaha), a music synthesizer

Mathematics

• A specific modal logic
• Dihedral group of order 6 (isomorphic to $S_{3}$), in group theory, the symmetric group of order $3!=6$
• The 3-dimensional sphere S³

Medecine or anatomy

• the third sacral vertebra of the vertebral column, in human anatomy
• the sacral spinal nerve 3, a spinal nerve of the sacral segment
• S₃, an occasionally present third heart sound

Other

• "S3: Expedition to the Barrier Peaks", a Dungeons & Dragons adventure module
• S3: Keep in a cool place, a safety phrase in chemistry
• S3 National Highway, a National Highways of Pakistan
• S3 (Robot)
• British NVC community S3, a Swamps and tall-herb fens community in the British National Vegetation Classification system

and also :

• an abbreviation for Schedule 3, an Australian legal category assigned to drugs
• _S3, an online science magazine published by super/collider
• S postcode area, covering areas of inner Sheffield
• trisulfur, an allotrope of sulfur