S33 may refer to:

Aviation

Blériot-SPAD S.33 The Bleriot-SPAD S.33 was a small French airliner developed soon after World War I. The aircraft was a biplane of conventional configuration whose design owed much to the Blériot company's contemporary Fighter aircraft, fighter designs such as ...

, a French airliner *

Letov Š-33 The Letov Š-33 was a 1930s prototype Czechoslovak long-range bomber, designed and built by Letov. Development Intended to meet a Czech military requirement and designed as a three-seat long-range bomber, the Š-33 first flew in 1930. The Š-33 w ...

, a Czechoslovak bomber *

Madras Municipal Airport Madras Municipal Airport , formerly City-County Airport, is a public use airport located three nautical miles (6 km) northwest of the central business district of Madras, a city in Jefferson County, Oregon, United States. According to the ...

, in Jefferson County, Oregon, United States * Short S.33, a variant of the Short S.27 British biplane of the 1910s * Short S.33, a British flying boat of the 1930s *

Sikorsky S-33 Messenger The Sikorsky S-33 Messenger was an American two-seat sesquiplane designed and built by the Sikorsky Manufacturing Corporation in 1925. The first of two examples built participated in the Sixth Pulitzer Trophy Race at Mitchel Field, Long Island, ...

, an American sesquiplane *

Spectrum S-33 Independence The Spectrum S-33 Independence was a very light jet prototype designed and built by Spectrum Aeronautical using a carbon fiber construction process that makes the airplane weigh about two-thirds as much as a comparably sized aluminum-frame airpl ...

, an American business jet

Naval vessels

* * , a torpedo boat of the Imperial German Navy * * , a submarine of the United States Navy

Other uses

* S33 (Long Island bus) *

S33 (ZVV) The S33 is a regional railway line of the S-Bahn Zürich on the Zürcher Verkehrsverbund (ZVV), Zürich transportation network, and is one of the network's lines connecting the cantons of Zürich and Schaffhausen. Route * The line runs fro ...

, a line of the Zürich S-Bahn * County Route S33 (Bergen County, New Jersey) * S33: Take precautionary measures against static discharges, a safety phrase * Section 33 of the ''Canadian Charter of Rights and Freedoms'' *

Sotho language Sotho (), also known as ''Sesotho'' (), Southern Sotho, or ''Sesotho sa Borwa'' is a Southern Bantu languages, Southern Bantu language spoken in Lesotho as its national language and South Africa where it is an official language. Like all Ba ...

Sulfur-33 Sulfur (16S) has 23 known isotopes with mass numbers ranging from 27 to 49, four of which are stable: 32S (95.02%), 33S (0.75%), 34S (4.21%), and 36S (0.02%). The preponderance of sulfur-32 is explained by its production from carbon-12 plus succe ...

, an isotope of sulfur * S33, a postcode district in the Hope Valley, Derbyshire, England {{Letter-NumberCombDisambig