The period's dominant patterns center on controlled atmosphere and gas-permeability strategies to extend shelf life and shape microbial communities across meats, fruits, and vegetables, using controlled atmosphere storage, vacuum packaging, CO2 enrichment, and permeability controls. Packaging materials and barrier designs—oxygen-barrier films and barrier properties—emerged as a core driver of quality, shelf life, and sensory outcomes, with beef packaging studies and film-migration analyses illustrating how barriers steer microbial growth and product quality. Coating and surface-treatment technologies, including sucrose ester coatings and permeable fruit coatings, extended storage life for apples and other produce. Packaging choices also influenced safety and spoilage risk, with CO2 packaging affecting Campylobacter detection and nitrosamine formation considerations. Historical Significance: Foundational breakthroughs include the introduction of controlled irradiation to inactivate pathogens and extend shelf-life, which spurred regulatory considerations and shaped packaging and processing debates. Foundational texts synthesized barrier science with practical packaging determinants, guiding industry practice and setting education and standards in packaging. Systematic analyses of shelf life factors enabled more reliable shelf-life predictions and risk-based preservation approaches. Edible moisture barriers and edible coatings research opened new avenues for postharvest and consumer-acceptable packaging options. The period catalyzed shifts toward integrative packaging design that blends atmosphere management, barrier technologies, and surface treatments in pursuit of safety, quality, and extended shelf life.