GET SERIAL PORT MAPPING ( numArray ; nameArray )
  | 
RECEIVE BUFFER ( receiveVar )
  | 
RECEIVE PACKET ( {docRef ;} receiveVar ; stopChar ) RECEIVE PACKET ( {docRef ;} receiveVar ; numBytes )
  | 
RECEIVE RECORD {( aTable )}
  | 
RECEIVE VARIABLE ( variable )
  | 
SEND PACKET ( {DocRef ;} packet )
  | 
SEND RECORD {( aTable )}
  | 
SEND VARIABLE ( variable )
  | 
SET CHANNEL ( port ; settings )  SET CHANNEL ( operation ; document )
  | 
SET TIMEOUT ( seconds )
  | 
| [USE CHARACTER SET ( map |