Matthias Kalle Dalheimer is the President & CEO of Klar?lvdalens Datakonsult AB, a virtual company with employees spread out over Northern and Central Europe. They specialize in platform-independent software development, often using Qt, of course. Kalle is a core team member of the KDE Project, where he has held lots of voluntary positions, including library maintainer and evangelist. He currently maintains the KLyX and KChart applications. In his spare time, Kalle continuously rebuilds his old farm in the middle of the Swedish forests where he lives with his wife, his son, and his soon-to-be-expected second child; helps his son build up wooden miniature railways; and enjoys hikes in the forest, gardening and carpentry. Kalle has written and translated a number of books for O'Reilly & Associates, among others a (German) book about KDE and (together with Matt Welsh and Lar Kaufman) Running Linux.