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
- system audit
- system availability
- system average interruption duration
- system average interruption frequency
- system balance
- system bath model
- system-bath model
- System Biology
- system biology
- system biology of medicinal Resource
- system boundary
- system bus
- system cabinet
- system call
- system chart
- system compatibility
- system complexity
- system configuration
- System Constraint
- system control
- system control and metering
- system control program
- system control unit
- system conversion
- system CPU time