Acknowledgement

Some paragraphs in this tutorial are extracted from the book:

"Sams Teach Yourself UML in 24 Hours" writen by Joseph Schmuller
Sams Publishing 1999

Other literature used to form this interactive tutorial is diploma work:

"Digital Library - concept and implementation" by Slobodan Kalajdziski
University "St. Cyril and Methodius" Skopje 2000

Some of examples are product of imagination of the author.

Special thanks to
prof.D-r.Danco Davcev and
ass.M-r.Vladimir Trajkovic from Faculty of Electrical Engineering - Skopje