Final answer:
A major resource in the Software Project Management Plan is the people who will develop the software, along with support software.
Step-by-step explanation:
In software project management, a major resource in the Software Project Management Plan is people who will develop the software. These are the individuals responsible for designing, coding, testing, and delivering the software product. Another major resource is support software, which includes tools and applications used to assist in the development process. While hardware on which the software will run is important, it is not typically considered a major resource in the Software Project Management Plan.