3d printing, electrical engineering, unity3d game & tool development c#, html4.x, xhtml1.1, html5, xml, css2, css3, javascript1.2, jquery, sql, mysql4, typo3, typolight, redaxo, webkit, frameworks, php, apache, web server, unix, shell, web app, web service, api, soap, seo, optimization, server infrastructure, communication systems, digital imaging, photoshop, illustrator, indesign, vegas, acid, soundforge, bitwig, music, sound recording, windows and linux, ..