- 2 Alfred Music Publishing
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- 54 Cambridge University Press
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- 8 DASAN
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- 36 Dell
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- 9 hp inc.
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- 6 Klett
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- 2 Klett-Langenscheidt
- 22 Klett Sprachen
- 8 Klett Sprachen GmbH
- 3 Kosmos (Franckh-Kosmos)
- 2 KRUX
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- 15 Marc Dorcel (FR)
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- 18 Microsoft
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- 6 Opticon
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- 37 Pearson
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- 48 PEARSON Education Limited
- 14 Pearson Longman
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