TERMINAL
present(data): to present data, which are translated by the
     Representation Processor, on the screen

REPRESENTATION PROCESSOR
translate(data): to translate Data into Byte code or HTML

SYSTEM INTERFACE
createSession(): calls the Session's constructor(create()).
destroySession(): calls the Session's destructor(destroy()).
passData(): gets data and decides to whom to pass, in dependence:
          transmitter /receiver.
handlingMask(): passes the information which mask is demanded to
  the receiver.
handlingLogout():calls destroySession()

SESSION
create(): Is the Constructor which is called by createSession(), and
     opens the Session for a user.
destroy(): Is the Destructor which is called by destroySession(), and
destroys the Session which its components.
handlingOK(): in connection to the active control it knows how to
      deal with Ok's within the Session
handlingDB(): knows how to deal with the database.

LOGIN
login(): knows how to deal with the delivered data. First pocedure:
    calls handlingMask, the second wait for data from the terminal
    and checks it( calls handlingDB) and then calls the destructor.

ENQUERY
enquery(): sends MaskID, knows how to deal with the users enquery
         input, wait for input, checks input and so on.
cancel(): knows how to deal with the usersinput : CANCEL
OK(): calls handlingOK.

AUCTION
Auction(): is neccesary for requestion if the user really want to bid.
OK(): calls handlingOK with the result to call handlingDB and edit the new prize.
cancel(): cancels the auction

RECORDER
recorder(): sends MaskID, deals with the input, request, checks or wait
for  input

ADMINISTRATION, USER and REAL ESTATE ADMIN.
seek(): Maybe deals with the enquery or leaf through the whole database.