The Nigeria Association of Computing Students (NACOS) was established in July 1993 by a consortium of students under the name Nigeria Association of Computer Science Students (NACOSS), with the endorsement of the Nigeria Computer Society (NCS) as its parent organization. NACOS serves as a platform for students engaged in various IT-related fields to collectively address and advocate for issues of interest in a coordinated and structured manner.

NACOSites, referring to its members, are students pursuing tertiary education in computer-related disciplines such as Computer Science, Computer Engineering, and Information Technology. Each member is affiliated with the Association's local chapter within their respective institutions.

As of March 2023, NACOS proudly asserts itself as the largest and most organized student body in Africa. With a substantial membership of over one million registered members, spread across more than two hundred and fifty local chapters (and additional unregistered chapters), NACOS extends its influence to various institutions, including universities, polytechnics, and colleges of education, spanning all six geopolitical zones of Nigeria.