| Abbreviation | Definition |
|---|---|
| NL | No Loops |
| NL | Non Leading |
| NLP | Natural Language Processing |
| NM | No Mark |
| NMI | Non Maskable Interrupt |
| NOOP | No Operation |
| NO-OP | No Operation |
| NOP | No Operation |
| NOR | logical NOT OR |
| NOT | logical NOT, negation |
| NPC | Non Programmable Character |
| NPH | Non Parsed Header |
| NRP | No Return Point |
| NRS | Not Read Set |
| NS | Next Step |
| NSI | Next Sequential Instruction |
| NSU | Next Syntactic Unit |
| NTA | NIEHS Trainees Assembly |
| NTLA | National Transitional Legislative Assembly |
| NTLA | Northern Territory Legislative Assembly |