abbr. 产品需求文档（Product Requirement Document）；产品研究与开发（Product Research and Development）；珠江三角洲（Pearl River Delta）；墨西哥民主革命党（Partido de la Revolución Democrática）；（医学）外伤后视网膜脱离（post-traumatic retinal detachment）；综合性技术研究与开发（Polytechnical Research and Development）
The deadlockproblemresulting from parallelresourcesShared by independent manufacturingprocesses is discussed and theconceptofPRDS (parallel resource deadlock Structures) is outlined.