noun

• Initialism of cardiopulmonary resuscitation. [A first aid procedure for cardiac arrest involving compression of the chest wall alternating with artificial respiration.]
• Initialism of calibrated peer review.
• Initialism of common-pool resource.
• Initialism of corrosion penetration rate.
• (rail transport, Canada, US) Initialism of Canadian Pacific Railway.
• (law, England and Wales) Initialism of Civil Procedure Rules.