O/S缩写的意思

FE T/S RHT NWL MAT. NK. B.S. CTF B.C. Ram YH GOH MMC FOA WMSP. AQL S/S ST B.D MTO SS TR SZ. L. DN HSP P.P. W.L. V. PV S.P. T. SAP FNP WP BTM. SA l. TL C.W L. JKT. RN. ASTMC.W.F.P. B/G LOA SNP Ly DF C/L CS GWS BR FFM D. TOT TSN a.s. PD SC