There are various types of manuscripts and journals for scientific communication. Manuscripts can be for original research, letters, reviews, or case reports. Journals can be general or specialty-focused, peer-reviewed or invited, and academic, society-sponsored, or industry-sponsored. The structure of research papers generally follows the "IMRAD" format of Introduction, Methods, Results, and Discussion sections. Additional components may include acknowledgments, trials registration, author contributions, and conflict of interest statements.