CPR stands for Cardiopulmonary Resuscitation, a life-saving technique used in emergencies when someone's heartbeat or breathing has stopped. CPR aims to restore blood flow and oxygen to vital organs, particularly the brain, in order to prevent brain damage and keep the person alive until medical professionals can take over. 

Basic first aid involves providing immediate care to someone who is injured or ill until professional medical help arrives. It's designed to help stabilize the person's condition and prevent the situation from getting worse. 

An Automated External Defibrillator (AED) is a portable device used to treat people who are experiencing sudden cardiac arrest (SCA). It delivers an electric shock to the heart to restore a normal rhythm. AEDs are designed for easy use, even by non-medical professionals, and guide the user through the process with voice prompts. 

Pediatric CPR is a life-saving technique used when a child (under the age of 18) is not breathing or has no pulse. It's essential to know the specific differences between adult and pediatric CPR, especially in terms of the force applied and the methods used for airway management.