Assembler-Directive: one of

.186          .286          .286C         .286P
.287          .386          .386C         .386P
.387          .486          .486C         .486P
.586          .586P         .686          .686P
.8086         .8087          ALIGN        .ALPHA
 ASSUME       %BIN          .CODE          COMM
.CONST        .CREF         .DATA         .DATA?
 DB            DD            DF            DOSSEG
.DOSSEG        DQ            DT            DW
 ECHO          END           ENDP          ENDS
 EQU          .ERR          .ERR1         .ERR2
.ERRB         .ERRDEF       .ERRDIF       .ERRDIFI
.ERRE         .ERRIDN       .ERRIDNI      .ERRNB
.ERRNDEF      .ERRNZ         EVEN          EXTERN
 EXTERNDEF     EXTRN        .FARDATA      .FARDATA?
 GROUP         INCLUDELIB    LABEL        .LALL
.LFCOND       .LIST         .LISTALL      .LISTIF
.LISTMACRO    .LISTMACROALL  LOCAL        .MMX
.MODEL         NAME         .NOCREF       .NOLIST
.NOLISTIF     .NOLISTMACRO  .NOMMX        .NOSIMD
 OPTION        ORG          %OUT           PAGE
 PROC          PUBLIC       .RADIX         RECORD
 .SALL         SEGMENT      .SEQ          .SFCOND
 .SIMD        .STACK         STRUC         STRUCT
 SUBTITLE      SUBTTL       .TFCOND        TITLE
 TYPEDEF       UNION        .XALL         .XCREF
 .XLIST       .XMM