AIJ

AIJ, Aij, or aij could refer to:


 * Artificial Intelligence (journal), a scholarly journal about artificial intelligence
 * $$A_{ij}$$, the notation for the entry in the i-th row and j-th column of a matrix (mathematics)
 * Inter-Zab Jewish Neo-Aramaic, a Judeo-Aramaic dialect spoken in Israel and Iraq, by ISO 639 code
 * Architectural Institute of Japan, a Japanese institute for people in architecture
 * Interjet, a defunct low-cost airline based in Mexico from 2005 to 2020, by ICAO code
 * Assemblée InterJurassienne, an organization that proposed a way of making new Swiss cantons in 2007; see Jura separatism
 * Air Jet, a defunct airline based in France from 1974 to 2003, by ICAO code; see List of defunct airlines of France
 * Artificial Intelligence Journalist, a type of AI-based journalism software created by the NewsRx company in 1999