OOPs I posted this elsewhere first, sorry moderator! Hello Could anyone assist I am trying to suss out the abbreviations on my grandads Army Form B102 as per below: Nature of Engagement - AC Industry Group - DA Cause of becoming non-effective Class A Release Z(T) then a word beginning Red????? Number 15 - its just says S G 2 Specialist Qualification 47 NS23 Medical Category c - A1 F - 51 there are numerous references to 51 and or 51c (Age and service group) throughout - but he wasn't 51 yrs old Other initials I don't understand are the PA from REME/PA/IUL/IEME. Written right across the front of form B102 in big letters are also 1143 CMAO?? Thanks in anticipation