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| 
       NAME  | 
    
       PURPOSE  | 
    
       FORMAT  | 
  
| CLS | Clears the screen. | CLS | 
| COM ON /OFF /STOP  | 
    Enables and  disables communication via RS-232C.  | 
    COM ON COM OFF COM STOP  | 
  
| CONT | Continues program exe- cution after a <BREAK> or a STOP statement.  | 
    CONT | 
| COS | Returns  the cosine of an angle.  | 
    COS(x) where: x is an angle  in radians | 
  
| CSAVE, CSAVEM | See SAVE. | |
| CSNG | Converts  a  number to single precision.  | 
    CSNG(x) where: x is an integer or double precision number | 
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