| Term | Description |
| Nanosecond | One-billionth of a second. |
| Network | A group of computers connected together capable of sharing files and resources such as a modems, printers or hard drives. |
| Network Adapter | See NIC. |
| Network Administrator | A person responsible for the maintenance and operation of a computer network. |
| Newsgroup | A virtual area or chat room on the Internet for the discussion of a specific topic. There is usually a moderator that can screen out any non-related or improper messages. |
| NIC | Network Interface Card. An expansion card that fits into a computer and connects via the network cable to the NICs installed in other computers on the network. It works with the network operating system to send and receive information over the network. |
| Node | In networking and communications, a node is any computer or device attached to the network. |
| Noise | Interference on a communications channel often caused by nearby electrical equipment, power lines, or poor connections. |
| Non-interlaced | A method of refreshing the image on a monitor. A Non-interlaced monitor refreshes the entire image (each scan line) in one pass. An interlaced monitor refreshes the odd-numbered scan lines first, then refreshes the even-numbered scan lines on the second pass, which can cause flicker and eye strain. |
| Nonconductor | Any material that transmits or conducts electrical current very poorly. |
| Numeric Keypad | A set of keys to the right of the main part of the keyboard, used for numeric data entry. |
| NUMLOCK Key | A key on the keyboard that, when pressed, toggles on the ability of the keypad part of the keyboard to input numbers and numerical functions. When pressed again, the keys on the keypad perform cursor movement functions. |