| N.I.L. | Nihilism Is Liberation 
| Others |
| NIL | Naczelna Izba Lekarska
| Others |
| NIL | Name Image and Likeness
| Others |
| NIL | Nano Imprint Lithography
| Others |
| NIL | Nano-Imprint Lithography
| Others |
| NIL | Nanoparticle Information Library
| Others |
| NIL | National Imagery Library
| Others |
| NIL | National Information Library
| Others |
| NIL | Native Innocent Landscape
| Others |
| NIL | Near Isogenic Line
| Others |
| NIL | Near-Isogenic Line(s)
| Others |
| NIL | Negative for Intra-epithelial Lesion
| Others |
| NIL | Negotiable Instruments Law
| Others |
| NIL | Net Income or Loss
| Others |
| NIL | Netball Is Lame
| Others |
| NIL | Netbus Is Lame
| Others |
| NIL | Network Innovation Laboratories
| Others |
| NIL | Network Intelligent Link
| Others |
| NIL | Never In Life
| Others |
| NIL | New Idea List
| Others |
| NIL | New Implementation of LISP
| Others |
| NIL | Next In Line
| Others |
| NIL | NIL is listed
| Others |
| NIL | No Interest Loan
| Others |
| NIL | No Limit
| Others |
| NIL | Nodus In Largo
| Others |
| NIL | North Island Line
| Others |
| NIL | Norton Icon Library
| Others |
| NIL | Not In List
| Others |
| NIL | Not In Log
| Others |
| NIL | Nothing in Line
| Others |
| NIL | Nothing Is Left
| Others |
| NIL | Zero
| Others |