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| English | Polish |
| COMMERCIAL AT | handlowe "po" (The separator between account names and domain names in Internet e-mail addresses) |
| commercial press | komercyjna maszyna drukarska (A high volume printing machine capable of creating full-colour publications or other printed pieces) |
| commercial printing | drukowanie komercyjne (The process of producing copies of documents, publications, or images in high volume) |
| unsolicited commercial e-mail | niechciane komercyjne wiadomości e-mail (An unsolicited and typically unwelcome message, often commercial or political in nature, transmitted via the Internet as a mass mailing (sometimes as if from a fictitious user or domain) to a large number of recipients) |