Warning: file_get_contents(https://ojs.journalbusiness.my/ojs.php): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /var/www/ojs.unud.ac.id_backup/lib/pkp/includes/functions.inc.php on line 4 Kurniawan, Yandi. " Room and Laboratory Equipment Lending Based On Smartphone Application Using QR Code Technology." Journal of Electrical, Electronics and Informatics [Online], 5.2 (2021): 57-65. Web. 6 Sep. 2026