4. The apparatus of claim 3 wherein said icon-based language apparatus further comprises: program confirming apparatus for disabling said processing model apparatus in response to input data representative of an abnormally ending program entered by said users.
3. The apparatus of claim 1 wherein said icon-based language apparatus comprises: interactive editor for detecting errors entered into said input data by said users; and apparatus, responsive to said detected errors, for displaying an indication of said detected errors to said users.