Biochem. , symbol for asparagine
• Printing , symbol for en
• Chess , symbol for knight
• naira (Nigerian monetary unit)
• Electrical engineering neutral
• (ital.) Physics , symbol for neutron number
• British fishing port registration for Newry
• Physics , symbol for newton(s)
• ngultrum (monetary unit of Bhutan; see also under Nu)
• Chem. , symbol for nitrogen
• north(ern)
• postcode for north London
• international vehicle registration for Norway
• nuclear (as in N-weapon )
• Physics , symbol for nucleon
• (ital.) Chem. , Physics , symbol for number of molecules, particles, etc
• international civil aircraft marking for USA
• (ital.) Chem. , indicating substitution on a nitrogen atom (as in N-phenylhydroxylamine )