A system and apparatus to create text messages and the like on a standard computing device keyboard and the like and then send the messages to destinations via a cell phone has been presented. The first transistor is switched on in the active state and off in the sleep state; the second transistor is switched off in the active state and on in the sleep state. A processor monitors the sensor and controls a gas source to deliver oxygen-containing gas through a tube extending into the patient’s airway with the flow rate varying over each respiratory cycle in a predetermined non-constant waveform synchronized with the respiratory cycle to augment the patient’s spontaneous respiration. A heater chamber containing the heater core is open at its bottom and communicates with the second blowing opening.