Bullinger's Correspondence - electronical edition

Correspondence of the Zurich reformator Heinrich Bullinger (1504-1575), the successor of Huldrych Zwingli, ..., German


Allgemeine Deutsche Biographie

ca. 27'000 Biographies of artists, scientists and military personnel, German


Marx and Bakunin - Marx und Bakunin

Author: Fritz Brupbacher (1874 - 1944), workers doctor, Zurich, German


Der Freisinnige

Freiburger politische Blätter,
1. März-25. Juli 1832, Nr. 1-145, German


The great Swiss peasant war 1653 - Der grosse Schweizerische Bauernkrieg 1653

Author: Hans Mühlestein, 1887 - 1969, Swiss art historian and writer, German


About us

ARPA Data GmbH was founded in 1993. Its headquarters are in Adliswil, approximately 6 km south of Zurich-center, in the valley of the Sihl.


ARPA Data GmbH deals with special programming around the optical character recognition (OCR) apart to make this content available in electronic form.
Great emphasis is placed on the most simple and streamlined processes to facilitate the work of the end user. The programs show user-friendly interfaces that provide quick connections to databases.


Our guiding principle is the knowledge that printed literature has to be made accessible quickly and efficiently. This mainly includes old documents as

  • Books    Newspapers    Magazines    Images,    
which are preserved by an electronically reprocessed version before the collapse due to overuse and brittle paper.

Database programming

In conjunction with partners we realize further projects as