Terms Used In 18 USC 3126

• agency: includes any department, independent establishment, commission, administration, authority, board or bureau of the United States or any corporation in which the United States has a proprietary interest, unless the context shows that such term was intended to be used in a more limited sense. See 18 USC 6
• department: means one of the executive departments enumerated in section 1 of Title 5, unless the context shows that such term was intended to describe the executive, legislative, or judicial branches of the government. See 18 USC 6
• pen register: means a device or process which records or decodes dialing, routing, addressing, or signaling information transmitted by an instrument or facility from which a wire or electronic communication is transmitted, provided, however, that such information shall not include the contents of any communication, but such term does not include any device or process used by a provider or customer of a wire or electronic communication service for billing, or recording as an incident to billing, for communications services provided by such provider or any device or process used by a provider or customer of a wire communication service for cost accounting or other like purposes in the ordinary course of its business. See 18 USC 3127