工学 食品安全 释 food safety objective；FSO 食品安全目标 食品中的某种危害可提供或促进适当保护水平（appropriate level of protection，ALOP）的最大允许频率或浓度。食品安全目标的概念仅限于食品安全，不涉及质量。
网络与数据通信 无线网络 释文 free space optics, FSO 自由空间光束
- direct manipulation
- direct-mapped cache
- direct mapping
- direct market valuation approach
- direct measurement
- direct measurement for electrical quantities
- direct measurement of radiation environment
- direct memory access
- direct memory access, DMA
- direct methanol fuel cell
- direct methanol fuel cell, DMFC
- direct method
- direct method of variation
- direct method to determine flux control coefficient
- direct method weighting
- direct microscopic count method
- direct modeling
- direct molecular dynamics
- direct moral education
- direct motion
- direct motor thrust contro
- direct moxibustion
- direct multiplication
- directness
- direct neutron decay