APT post-processor words.  By convention these are a subset of the vocabulary words that appear to the left of the forward slash in an APT statement.

          
            switch (subtype)
            {
                case 1: return "END";
                case 2: return "STOP";
                case 3: return "OPSTOP";
                case 4: return "ISTOP";
                case 5: return "RAPID";
                case 6: return "SWITCH";
                case 7: return "RETRCT";
                case 8: return "DRESS";
                case 9: return "PICKUP";
                case 10: return "UNLOAD";
                case 11: return "PENUP";
                case 12: return "PENDWN";
                case 13: return "ZERO";
                case 14: return "GOHOME";
                case 15: return "RESET";
                case 16: return "GOCLER";
                case 17: return "DRAWLI";
                case 18: return "PROBY";
                case 19: return "PROBX";
                case 20: return "ULOCKX";
                case 21: return "LOCKX";
                case 22: return "FACEML";
                case 1001: return "PLUNGE";
                case 1002: return "HEAD";
                case 1003: return "MODE";
                case 1004: return "CLEARP";
                case 1005: return "TMARK";
                case 1006: return "REWIND";
                case 1007: return "CUTCOM";
                case 1008: return "REVERS";
                case 1009: return "FEDRAT";
                case 1010: return "DELAY";
                case 1011: return "AIR";
                case 1012: return "DELETE";    // also OPSKIP
                case 1013: return "LEADER";
                case 1014: return "PPLOT";
                case 1015: return "MACHIN";
                case 1016: return "MCHTOL";
                case 1017: return "PIVOTZ";
                case 1018: return "MCHFIN";
                case 1019: return "SEQNO";
                case 1020: return "INTCOD";
                case 1021: return "DISPLY";
                case 1022: return "AUXFUN";
                case 1023: return "CHECK";
                case 1024: return "POSTN";
                case 1025: return "TOOLNO";
                case 1026: return "ROTABL";
                case 1027: return "ORIGIN";
                case 1028: return "SAFETY";
                case 1029: return "ARCSLP";
                case 1030: return "COOLNT";
                case 1031: return "SPINDL";
                case 1032: return "IFRO";
                case 1033: return "TURRET";
                case 1034: return "NOTUSED";
                case 1035: return "ROTHED";
                case 1036: return "THREAD";
                case 1037: return "TRANS";
                case 1038: return "TRACUT";
                case 1039: return "INDEX";
                case 1040: return "COPY";
                case 1041: return "PLOT";
                case 1042: return "OVPLOT";
                case 1043: return "LETTER";
                case 1044: return "PPRINT";
                case 1045: return "PARTNO";
                case 1046: return "INSERT";
                case 1047: return "CAMERA";
                case 1048: return "PREFUN";
                case 1049: return "COUPLE";
                case 1050: return "PITCH";
                case 1051: return "MDWRIT";
                case 1052: return "MDEND";
                case 1053: return "ASLOPE";
                case 1054: return "CYCLE";
                case 1055: return "LOADTL";
                case 1056: return "SELCTL";
                case 1057: return "CLRSRF";
                case 1058: return "DWELL";
                case 1059: return "DRAFT";
                case 1060: return "CLAMP";
                case 1061: return "PLABEL";
                case 1062: return "MAXDPM";
                case 1063: return "SLOWDN";
                case 1064: return "MAXVEL";
                case 1065: return "LPRINT";
                case 1066: return "MOVETO";
                case 1067: return "CORNFD";
                case 1068: return "PBS";
                case 1069: return "REGBRK";
                case 1070: return "VTLAXS";
                case 1071: return "WCORN";
                case 1072: return "MAGTAP";
                default: return null;
            }