SRD
[1] Secret Restricted Data (->""IEEE" Standard Dictionary")[2] Self Reading Dosimeter (->""IEEE" Standard Dictionary")
[3] Step-Recovery Diode (->""IEEE" Standard Dictionary")
[4] Secondary Receive Data
[5] Shuttle Requirements Document (->""NASA" Acronym List")
[6] Site Requirements Document (->"NASA Acronym List")
[7] Software Requirements Document (->"NASA Acronym List")
[8] Systems Requirements Document (->"NASA Acronym List")