Digital reference service

Digital reference (more commonly called virtual reference) is a service by which a library reference service is conducted online, and the reference transaction is a computer-mediated communication. It is the remote, computer-mediated delivery of reference information provided by library professionals to users who cannot access or do not want face-to-face communication. Virtual ___ ________ __________ _____ ____ _______ ______ _____ ______ _______ ____ __________.
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