Information that is the subject of measures to safeguard its use and dissemination.
Potentially ANY information--technical, business, trade secrets, research data, products⁄ product plans, services, customers, market data, software, inventions, processes, electronic data, samples, designs, drawings, algorithms, etc.--disclosed either directly or indirectly, in writing, visually, orally or by illustrations, samples, or products.
Any proprietary business information or methods, such as client lists and other know how that the company wishes to keep confidential from competitors and others.