• N₂, the chemical formula for nitrogen gas
• N2 is the United States Navy
  United States Navy
  The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...
  
   term for a senior military intelligence officer
• N2 diagram, a function to function data interchange
• N 2 Gether Now
  N 2 Gether Now
  "N 2 Gether Now" is a hip hop song by American nu metal band Limp Bizkit. It was released as the third single in their second album Significant Other. The single was released alongside their last single "Break Stuff."-Music:...
  
  , a 1999 song by nu metal band Limp Bizkit
• DSC-N2, a 2006 Sony Cyber-shot series digital camera
• N² Weapon or N2 Weapon from the Neon Genesis Evangelion series
• N2, a postcode district in the N postcode area
  N postcode area
  The N postcode area, also known as the London N postcode area, is the part of the London post town covering part of North London, England....
  
  
• ATC code N02
  ATC code N02
  -N02AA Natural opium alkaloids:-N02AA Natural opium alkaloids:-N02AA Natural opium alkaloids::N02AA01 Morphine:N02AA02 Opium:N02AA03 Hydromorphone:N02AA04 Nicomorphine:N02AA05 Oxycodone:N02AA08 Dihydrocodeine:N02AA09 Diamorphine:N02AA10 Papaveretum...
  
   Analgesics, a subgroup of the Anatomical Therapeutic Chemical Classification System

Transportation & Military

• N₂ (jet engines), the power turbine section RPM in a jet engine
• N2 (Long Island bus)
• N-2 rocket, a 1981 derivative of the American Delta rocket, produced under licence in Japan
• GNR Class N2
  GNR Class N2
  The Great Northern Railway Class N2 is an 0-6-2T side tank steam locomotive designed by Nigel Gresley and introduced in 1920. Further batches were built by the London and North Eastern Railway from 1925...
  
  , a 1920 British 0-6-2T steam locomotive
• London Buses route N2
• IATA airline desginator for South East Airlines or Kabo Air
• USS N-2 (SS-54)
  USS N-2 (SS-54)
  USS N-2 was a N-class coastal defense submarine of the United States Navy. Her keel was laid down on 29 July 1915 by Seattle Construction and Drydock Company. She was launched on 16 January 1917 sponsored by Mrs. Whitford Drake, and commissioned on 26 September 1917 with Lieutenant Hugh C...
  
  , a 1917 N-class coastal defense submarine of the United States Navy

Other

• N200 (neuroscience)
  N200 (neuroscience)
  The N200, or N2, is an event-related potential component. An ERP can be monitored using a non-invasive electroencephalography cap that is fitted over the scalp on human subjects...
  
  , an event-related potential (ERP) component in the 200-300 ms poststimulus range
• A non-small cell lung carcinoma staging code for Metastasis to ipsilateral mediastinal or subcarinal lymph nodes
• A para formaldehyde-based filling material for root canal
  Root canal
  A root canal is the space within the root of a tooth. It is part of a naturally occurring space within a tooth that consists of the pulp chamber , the main canal, and more intricate anatomical branches that may connect the root canals to each other or to the surface of the root.-Root canal anatomy:...
  
  s, also called Sargenti paste, considered below the standard of care to use for root canals in the US, can cause serious injury
• A type of Large Goods Vehicle
  Large Goods Vehicle
  A large goods vehicle , is the European Union term for any truck with a gross combination mass of over...
  
  
• High Pressure Rotor Speed, an aircraft engine parameter
• Revolutions per minute
  Revolutions per minute
  Revolutions per minute is a measure of the frequency of a rotation. It annotates the number of full rotations completed in one minute around a fixed axis...
  
  , a term of the high-pressure compressor in a turbofan engine, expressed as a percentage of the maximum
• The branding used by the Irish television station Network 2 (now RTÉ Two
  RTÉ Two
  RTÉ Two is a free-to-air general entertainment channel operated by Irish state broadcaster Raidió Teilifís Éireann. RTÉ Two is available throughout the island of Ireland through digital terrestrial service Saorview, VHF and UHF bands, and is also available via satellite to Irish subscribers of...
  
  ) between 1997-2004
• N2 Gateway
  N2 Gateway
  The N2 Gateway Housing Pilot Project is a large housebuilding project under construction in Cape Town, South Africa. It has been labeled by the national government's former Housing Minister Lindiwe Sisulu as “the biggest housing project ever undertaken by any Government.” Even though it is a joint...
  
  , a housing Project along the N2 freeway in Cape Town
• Carretera Nacional N-II, the former name for the Route Nacional from Madrid to Barcelona and France
• A model number of the Yamaha AvantGrand
  AvantGrand
  AvantGrand is a brand of digital piano introduced by Yamaha in 2009. The product line consists of a baby grand piano size , an upright piano version and a cabinet version ....
  
  piano