CORRIGENDUM
 ***********
 25.3.97   Again the explanation on the error introduced by near 
           cancellations in additions/subtractions.

 23.3.97   Fixed the exit part in the emulation of a DO loop

 29.12.96  Corrected a gross mistake in the explanation on the error 
           introduced by near cancellations in additions/subtractions.

  2.12.96  Fixed the explanation of assumed-size arrays 

 25.11.96  Example program for recursion simulation fixed(?).
           had a severe bug, one pixel blobs caused an abort.

 16.8.96   Several mistakes were introduced and corrected while working
           on the new I/O chapter. Hope these were the last mistakes!

 28.7.96   A gross mistake in the chapter on passing arrays, paragraph
           on character strings. Silly and erroneous identification
           of passed strings with assumed-size arrays (pointed out
           by Craig Burley).

 11.7.96   A mistake in the formula for the value of the control 
           variable of a DO loop (index) upon exiting the loop.
           Instead of:  e1 + (n * e3)  it is:  e1 + ((n - 1) * e3).
           That was simple, so I found it myself.

 14.4.96   Environment/Files & records:
           Corrected a long standing mistake in the description of 
           unformatted files on Digital UNIX (pointed by Steve Lionel). 
           The description of segmented records was improved, again
           with the help of Steve.