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For over 11 years Jan Zitniak has been a professional instructor concentrating on Microsoft Office. He holds an international Microsoft Excel – Office Excel ® 2010 Expert certificate and has written several books discussing Microsoft Office.

I'm author of books Microsoft Excel 2019 for intermediates, Microsoft Excel 2019 for beginners (for free, download here), Microsoft Outlook 2013 Jednoduše (translated to czech language), Microsoft Office 2016 Podrobná uživatelská příručka (translated to czech language).

The information mentioned in the books comes from practical experience he obtained at such large companies as T-Systems, BSH Bosch and Siemens, Veolia, Magneti Marelli, Coavis, National Bank of Slovakia and many others.

If you like my website you can support me by buying my book on Amazon clicking here.

Simple online Excel with many examples - Excelo.online

Excelo.online is a project for students, teachers, lecturers and other people who want to learn Excel online. Many Excel exercises available there.

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Ján Žitniak