Final answer:
Dr. Gus Lintner designed the first FFA jacket in 1933, which has become a lasting symbol of unity and pride for members of the National FFA Organization involved in agricultural education.
Step-by-step explanation:
The FFA jacket was designed by Dr. Gus Lintner, an agriculture teacher and member of the FFA, thereby setting a standard for the official dress of the organization. The jacket became a symbol of pride and unity among the members, representing the values and traditions of the National FFA Organization. The distinctive blue corduroy jacket with the FFA emblem on the back is still worn today by students across the United States who are involved in agricultural education programs.