#define             Macro constant definition
 #else               Conditional compilation branching
 #endif              Conditional compilation end
 #ifdef              Conditional compilation start (defined identifier)
 #ifndef             Conditional compilation start (undefined identifier)
 #include            Header file inclusion
 #output             Display message during compilation
 #pragma CODESEG     Code segment name control
 #pragma DEFLIB      Default library inclusion control
 #pragma ESCSEQ      Escape sequences in literal strings control
 #pragma EXTVAR      Non-referenced extern inclusion control
 #pragma INCLUDELIB  Library inclusion control
 #pragma RANGE       Array check calls control
 #pragma STACK       Stack check calls control
 #pragma W_EXPR_LOCAL Warning suppression: Local variable in expression
 #pragma W_EXTERN    Warning suppression: Extern initialization ignored
 #pragma W_FUNC_PROC Warning suppression: Function referenced as procedure
 #pragma W_GET_LOCAL Warning suppression: Local variable used in get
 #pragma W_INDIRECT  Warning suppression: Indirect reference to function name
 #pragma W_INIT_LOCAL Warning suppression: Local variable not initialized
 #pragma W_MAC_REDEF Warning suppression: Redefinition of macro
 #pragma W_PARAMSIZE Warning suppression: Parameter size mismatch
 #pragma W_PRECISION Warning suppression: Loss of precision
 #pragma W_RETURN    Warning suppression: Function end missing return value