A recent nursing graduate in a busy Emergency Department triages a patient who has sustained a large, deep puncture wound in his foot while working at a construction site. He is bleeding and is in pain. The nurse enters the triage data that she has obtained from the patient into a computerized, standard emergency patient-classification system. After she enters the assessment data, she notices an alert on the computer screen that prompts her to ask the patient about the status of his tetanus immunization. What system of technology is involved in generating the alert?