S42 may refer to:

Aviation

Blériot-SPAD S.42 The SPAD S.42 was a French biplane trainer aircraft of the early 1920s, developed by ''Société Pour L'Aviation et ses Dérivés Lactalis is a French multinational dairy products corporation, owned by the Besnier family and based in Laval ...

, a French biplane trainer aircraft * Sikorsky S-42, an American flying boat *

Springer Municipal Airport Springer Municipal Airport is a town owned, public use airport located one nautical mile (2 km) south of the central business district of Springer, a town in Colfax County, New Mexico, United States. It is included in the National ...

, in Colfax County, New Mexico, United States

Rail and transit

S42 (Berlin) S41 and S42 operate a circular service on the '' Ringbahn'' and are part of the Berlin S-Bahn. The S41 operates clockwise around the circle, the S42 operates counter-clockwise. See also * Line S4 References {{DEFAULTSORT:S4x (Berlin) Be ...

, a line of the Berlin S-Bah *

S42 (Long Island bus) Suffolk County Transit operates a number of bus routes in Suffolk County, New York, United States; a few in the town of Huntington are operated by Huntington Area Rapid Transit. The Villages of Patchogue and Port Jefferson, also have had their ...

S42 (New York City bus) The Metropolitan Transportation Authority (MTA) operates a number of bus routes in Staten Island, New York, United States. Some of them are the direct descendants of streetcar lines (see list of streetcar lines in Staten Island). Many routes ru ...

, serving Staten Island

Science

S-42 (geodetic datum) The SK-42 reference system also known as the Krasovsky 1940 ellipsoid, is a coordinate system established in the Soviet Union in 1942 as ''Systema koordinat'' (russian: Система координат 1942 года), and provides parameters whic ...

, used in Eastern Europe * S42: During fumigation/spraying wear suitable respiratory equipment (appropriate wording to be specified by the manufacturer), a safety phrase *

Sulfur-42 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 succ ...

, an isotope of sulfur

Submarines

* , of the Argentine Navy * , of the Royal Navy * , of the Indian Navy * , a submarine of the United States Navy

Other uses

IBM NetVista S42 NetVista is an umbrella name for a variety of products manufactured by IBM. Software suite The Software Suite was introduced in April 1996 as a client–server software suite, with the server software running on OS/2, and the client softwar ...

, a personal computer *

Siemens S42 The Siemens S40 is a mobile phone. Originally developed as the Bosch 1886 in 2000, the phone was branded as the Siemens S40 after Siemens acquired the Bosch mobile phone division. The Siemens S40 is a tri-band mobile phone that operates on the G ...

, a mobile phone * Zulu language * S42, a postcode district in Chesterfield, England {{Letter-Number Combination Disambiguation