Helmi, Y.R., Yuhandri, Y. and Nurcahyo, G.W. 2021. Expert System in Identifying Promotions for Civil Servants Using the Backward Chaining Method. Jurnal Informasi dan Teknologi. 3, 4 (Dec. 2021), 190-195. DOI:https://doi.org/10.37034/jidt.v3i4.149.