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Publisher
- institute of electrical and electronics engineers, inc.30
- penton media, inc., penton business media, inc. and their subsidiaries26
- united business media llc25
- warren communications news, inc.10
- the mcgraw-hill companies, inc.9
- idg communications, inc.7
- reed business information, inc. (us)7
- access intelligence, llc6
- network world, inc.6