PrePress-Consulting was founded 1992 by Stephan Jaeggi in Binningen near Basel (Switzerland). In the first years a broad range of consulting services for prepress was offered. Major topics were layout applications, PostScript imagesetters, data conversion and database pubslishing. In 1996 Stephan Jaeggi decided to concentrate on the use of the Portable Document Format (PDF) in print production. At the beginning the main interest were digital publications of printed material (e.g. anual CD for magazines, online archives). After 1998 PDF became more an more interesting as exchange format for press data. Later PDF became the preferred internal format for output workflow systems for CTP and digital printing systems. Today PrePress-Consulting offers multiple services around PDF in print production. In addition to printers and prepress service providers, ad agencies and publishers, more and more print buyers are interested in standardizing their digital prepress files. E.g. PrePress-Consulting has successfully supported Novartis Pharma in the global introduction of PDF/X-4 for all packaging prepress files. Beside consulting Stephan Jaeggi also shares his knowledge in many seminars and publications (mainly in german). The most important publication is the free newsletter PDF-AKTUELL which is published by Stephan Jaeggi since 1999!