
Negligence. An action or omission falling below the standard of care that a reasonable person would exercise in the same situation.
Netiquette. A code of conduct that governs behavior on the Internet. Netiquette, for example, requires Internet users not to send unsolicited commercial email, or “spam,” to large numbers of other users. Many Internet Service Providers and discussion groups will ban users who consistently violate these rules.
Nondisclosure Agreement (NDA). A contract in which a person or business agrees to maintain the confidentiality of proprietary information or trade secrets and not disclose such information without authorization. Employees, consultants, business partners and investors are often asked to sign nondisclosure agreements.
Nonexempt Employee. Employees who are protected by wage laws that mandate payment for every hour of overtime worked.
Nonprofit Corporation. A form of corporation in which no stockholder or trustee shares in profits or losses and which usually exists to accomplish some charitable or educational function. These organizations are exempt from corporate income taxes, and donations to these groups may be tax deductible.
Nonqualified Stock Options (NSOs). Nonqualified stock options may be granted to employees, consultants, contractors and others. When nonqualified stock options are exercised the holder must pay ordinary income tax on them, even if the shares have not yet been sold.
Notes Receivable. A secured or unsecured receivable evidenced by a note.
Numeric Messaging/Paging. A service that lets a pager receive pages and messages containing numeric information.

Occupational Safety and Health Administration (OSHA). A federal organization established to promote healthy and safe work environments. OSHA requires employers to inform employees of potential hazards, provide safety training and report workplace injuries. Many individual states have similar agencies.
OCR (Optical Character Recognition). Software that lets computers "read" printed documents input via a scanner and converts the image into a computer text file that users can edit.
OEM (Original Equipment Manufacturer). A company that produces the equipment that bears another company´s label.
Operating Expenses. In real estate, the costs of maintaining a property, such as utility charges and property taxes.
Overnight Delivery. A service promising delivery of packages by a designated time of the next business day.
Overrun. A quantity of printed material or other manufactured product that exceeds the amount ordered.