N5

N5 or N-5 may be:

• Now more predominantly used in predictive texting "OK" becomes "N5"
• N°5, a shortening for Number Five
• N5 Cluster, a government school zone for several primary and secondary schools in northern Singapore
• London Buses route N5
• Nexus 5
• N5, a postcode district in the N postcode area
• SP&S Class N-5, a steam locomotives class
• USS N-5 (SS-57), a 1917 N-class coastal defense submarine of the United States Navy
• The first level in the Japanese Language Proficiency Test
• N₅, the minimal non-modular and non-distributive lattice in mathematical order theory

Roads

N05 may refer to :

• ATC code N05 Psycholeptics, a subgroup of the Anatomical Therapeutic Chemical Classification System
• Hackettstown Airport FAA code
• Nephritic syndrome ICD-10 code

other 

• Kyrgyz International Airlines and Skagway Air Service IATA airline designator
• An early speculated name for Nintendo Seventh Generation console, due to it being their fifth (non-handheld) console. It was later announced as Wii
• Pentazenium (N₅⁺), a pentanitrogen cation in chemistry