Nigerian National Serials Data Centre, National Library of Nigeria2026-10-192026-10-191981-010331-2348https://nigeriareposit.nln.gov.ng/handle/20.500.14186/2994This is the 51st Publication of the National Library of Nigeria Published as the fourth edition through its Nigerian National Serials Data Centre, The Nigerian File of International Standard Serial Number serves as an annual cumulative registry of serial publications formally registered in Nigeria during the 1981 calendar year. The document contains a comprehensive catalog of 129 serial titles spanning diverse sectors such as government reports, academic journals, corporate newsletters, bulletins, directories, and newspapers. In its introductory section, the publication outlines the fundamental principles and significance of the International Standard Serial Number (ISSN) as an eight-digit unique identifier essential for efficient information storage, retrieval, library acquisition, and worldwide bibliographic control. Emphasizing the role of the National Library as the sole national bibliographic agency, the text provides guidelines for publishers, editors, and institutions regarding the proper assignment and printing of ISSN codes on serial issues. The main body meticulously itemizes each registered entry complete with its unique identifier (e.g., ISSN 0189-series and ISSN 0331-series), publishing body, location, and abbreviated key title followed by a comprehensive alphabetical title index at the conclusion to facilitate seamless reference and archival tracking for researchers, scholars, and digital librarians.• Introduction (Overview of the International Standard Serial Number, definition of serials, advantages, and role of the National Centre) • List of Serials Registered (Entries 1 to 129 detailing serial titles, registration numbers, publishing locations, publishers, and abbreviated key titles) • Title Index (Alphabetical index of all registered serials with their corresponding ISSNenArticle