Final answer:
Computerization is not a major component in NHTSA standards for EMS systems; instead, transportation, communication, and evaluation are key components.
Step-by-step explanation:
The component that is not a major component in National Highway Traffic Safety Administration (NHTSA) standards for Emergency Medical Services (EMS) systems is computerization. The NHTSA outlines essential components for an effective EMS system such as transportation, communication, and evaluation as key categories. Transportation refers to the provision of ambulances or other vehicles for patient care; communication involves the systems and protocols to facilitate dispatch and coordination among emergency response entities; and evaluation refers to the continual assessment and improvement of the EMS system. Computerization, while beneficial in many aspects of health care and EMS systems, is not specifically listed as a major component in the foundational NHTSA EMS standards.