Verlag C. H. Beck oHG
- Wilhelmstr. 9, 80801 München
- +49 (89) 38189-0
- +49 (89) 38189-398
operational services GmbH & Co. KG
- Frankfurt Airport Center, 60549 Frankfurt am Main
- +49 (69) 689702-710
- +49 (69) 689702-205
MSC Technologies GmbH
- Industriestraße 16, 76297 Stutensee
- +49 (7249) 910-0
- +49 (7249) 7993
KPS AG
- Beta-Str. 10H, 85774 Unterföhring
- +49 (89) 35631-0
- +49 (89) 35631-3300
F&M Consulting Gröne It-Services UG
- Westaap 25, 44581 Castrop-Rauxel
Linux Foundation
- 1 Letterman Drive / Building D / Suite D4700, 94129 San Francisco, CA
- +1 (415) 723-9709
META-LEVEL Software AG
- Saarbrücker Straße 51, 66130 Saarbrücken
- +49 (681) 99687-0
- +49 (681) 99687-99
KFG Level AG
- Ruessenstr. 4, 6341 Baar
- +41 (76) 66282
- +41 (76) 66283
4 Level@work
- Baumstraße 1, 01099 Dresden
- +49 (173) 3902631
- +49 (3212) 8804680
Level 3 Communications GmbH
- Rüsselsheimer Straße 22, 60326 Frankfurt am Main
- +49 (69) 5060800-0
- +49 (69) 5060800-1