>[CA_J]
Does the underscore represent a capital letter "i", as it does when Q types C_A? Or is it a placeholder for any possible character? He has also used it in place of a space or a dash in the past.
Some CAIJ websites:
Computer Applications International Journal - https://www.airccse.com/caij/
Contemporary Art in Jerusalem - https://caij.co/
Centre d'accès à l'information juridique - an information broker to 30,000 members of the legal community in Canada - https://www.caij.qc.ca/en/about-caij
Cámara Argentina de la Industria del Juguete - https://caij.org.ar/