Computer Journal Vol. 4 No. 2 (August 2026) presents a comprehensive collection of scholarly research highlighting contemporary advancements in artificial intelligence, software engineering, Internet of Things (IoT), and applied information systems. The edition prominently features machine learning and explainable AI (XAI) implementations—utilizing models such as Random Forest, XGBoost, CatBoost, and IndoBERT—applied to predictive modeling in urban climate phenomena, behavioral addictions, customer retention, and automated educational assessment. In the realm of IoT and hardware security, studies investigate real-time RFID monitoring, greenhouse microclimate control, laser-based intrusion detection, and vulnerability assessments aligned with OWASP standards, alongside storage performance evaluations of NTFS, exFAT, and EXT4 file systems on SSDs. Furthermore, the issue covers diverse system architecture designs and System Usability Scale (SUS) evaluations aimed at practical operational challenges, including hospital pharmacy inventory optimization, medical equipment maintenance, and MSME digitalization. Overall, this volume demonstrates the vital role of intelligent computing and reliable system engineering in driving digital transformation across healthcare, education, smart agriculture, and business operations.
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