Professional ethics in using library resources involves avoiding plagiarism, respecting copyright and privacy rights, and handling challenges appropriately. The key areas covered include plagiarism, copyright, privacy rights, challenges to materials, and internet ethics. Upholding intellectual freedom and equitable access to information for all people in the community is important. Users should cite sources, paraphrase ideas, and follow fair use guidelines to avoid plagiarism. Copyright protects the work of creators, and materials in libraries are generally for preservation, not widespread distribution. Privacy of user records and activities in the library should be maintained. Challenges to materials should be handled through a transparent review process outlined in library policies. Internet ethics focus on appropriate and legal use