| Normalization |
Notebook Computer |
| Notification |
Nudge Shadow |
| Null |
Null Character |
| Null Pointer |
Null String |
| Numeric |
Numerical Expression |
| Object |
Object Language |
| Object Oriented Programming |
Object Program |
| Octal |
Office Suite |
| Offline |
On mouse out |
| On mouse over |
On-board |
| Online |
Online Transaction |
| Opacity |
Opcode |
| Open |
Open Source Software |
| Operand |
Operating System |
| Operator |
Operator Overloading |