Colorado Code
Part 3 - Offenses Involving Communications
§ 18-9-301. Definitions

As used in sections 18-9-301 to 18-9-305, unless the context otherwise requires:
(1.5) "Aural transfer" means a transfer containing the human voice at any point between and including the point of origin and the point of reception.

(3.5) "Electronic communication service" means any service which provides to users thereof the ability to send or receive wire or electronic communications.
(3.7) "Electronic communications system" means any wire, radio, electromagnetic, photooptical, or photoelectronic facilities for the transmission of electronic communications and any computer facilities or related electronic equipment for the electronic storage of such communications.

(4.5) "Electronic storage" means:

(8.3) "Pen register" means a device which records or decodes electronic or other impulses which identify the numbers dialed or otherwise transmitted on the telephone line to which such device is attached but shall not include any device 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 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.
(8.5) "Readily accessible to the general public" means, with respect to a radio communication, that such communication is not:

(8.7) "Trap and trace device" means a device which captures the incoming electronic or other impulses which identify the originating number of an instrument or device from which a wire or electronic communication was transmitted.
(8.9) "User" means any person or entity which uses an electronic communication service and is duly authorized by the provider of such service to engage in such use.

Source: L. 71: R&RE, p. 472, § 1. C.R.S. 1963: § 40-9-301. L. 88: (1), (3), IP(4), (4)(a), (5), (8), and (9) amended and (1.5), (3.3), (3.5), (3.7), (4.5), (8.3), (8.5), (8.7), and (8.9) added, p. 691, § 5, effective May 29. L. 97: (3.3) and (9) amended, p. 602, § 2, effective August 6.