PFRX means Preflight Relmat X-1,2,3...9 or A,B,C...Z in NASA
Similar to PFRX
ACIO - Agency Chief Information OfficerACIP - Assembly Configuration and Integration Panel
ACLUF - American Civil Liberties Union Foundation
ACMT - Aircraft Certification Management Team
ACO - Assembly and Checkout Officer
ACP - Automated Change Processing
ACR - Apollo Cosmetic Reconstruction
View all in NASA