,UNION "<( SETS">
           ,EXAMPLES

#A4 ,A UNION ;,B IS WRITT5
  _% ,A.+,B _:
#B4 ;,C UNION ;,D EQUALS ! SET )
  ! ELE;TS "O1 TWO1 ?REE1 F\R1 &
  FIVE IS WRITT5 _%
  ,C.+,D .K .(1, 2, 3, 4, 5.) _:
#C4 ,A UNION ;,B EQUALS ! SET (
  ALL ;X S* T ;X IS AN ELE;T (
  ,A OR ;X IS AN ELE;T ( ;,B IS
  WRITT5 _%
  ,A.+,B .K
    .(X "1 X @E ,A OR X @E
    ,B.)
    _:







                              #A