Acknowledgements

This book would not exist without my customers. They were the ones who confronted me with problems, tasks and jobs that made me think of possible solutions and made me research stuff.

Also, it would not exist without the wonderful StackExchange and Stackoverflow platforms which draws together users and programmers, experts and interested people who ask questions, share solutions and discuss ideas.

Contributors

A number of people have sent me suggestions and corrections. I like to thank them all:

• Markus Wolf
• Adrian Pfeifle
• … (your name could be here if you notified me of anything you want to be improved, added or corrected in future releases of this book!)

Images

This eBook uses some images which were not created by myself. Here is a list:

• Chapter “How can I convert a color PDF into grayscale?”: The picture used in the demo PDF document for this chapter was made by Craig ONeal (“minds-eye”) who hosts some of his work at Flickr. This picture is licensed under “Creative Commons Atrributions 2.0 Generic” (attention!, not all of Craig’s pictures use this license!). I downloaded it from Wikimedia.org – See also here.