Thus, well-funded U.S. public libraries in the 1980s and 1990s typically had several Infotrac database terminals, several carousels of IAC cartridges, and several microfilm readers. Researchers would use the database terminals to compile a list of all the cartridge-and-frame codes for all articles they were interested in, then they would pull the corresponding cartridges from the carousels and use printers built into the readers to make photocopies of the articles as originally printed.