An assembly of electronic devices used for general inhalation anaesthesia (i.e., the delivery of oxygen (O2), nitrous oxide (N2O), other medical gases, and anaesthetic agents) and possibly total intravenous anaesthesia and local anaesthesia. Its main components are high, intermediate, and low pressure gas delivery systems, a breathing circuit (typically with a ventilator), and an anaesthetic gas scavenging system (AGSS). It has built-in alarms, analysers, control/monitoring systems, and typically has integrated circuitry/touchscreen displays for target controlled anaesthesia (TCA) for any type of patient (e.g., neonate, adult).