Specifies that words reserved in IBM COBOL V1.00 are to be regarded as reserved words, and changes the behavior of certain features to be compatible with that COBOL system. 
    
  
 
    Syntax:
 
       
      >>-.---.-.----.--IBM-MS--------------------><
   +-/-+ +-NO-+
 
    Properties:
 
       
       
      
 
           
           
           
             
              | Default: | NOIBM-MS (Dialect) | 
 
             
              | Phase: | Syntax check | 
 
             
              | $SET: | Initial | 
 
          
 
        
 
 
    Dependencies:
 
       
      IBM-MS sets DEFAULTBYTE"0" and ACCEPTREFRESH immediately. 
      
 
    
Comments:
This directive is synonymous with the PC1 and MS"1" directives.