SISTEM INFORMASI ABSENSI KARYAWAN MENGGUNAKAN QR CODE (QUICK RESPONSE) DI PT. REDES JAYA PERSADA: EMPLOYEE ATTENDANCE INFORMATION SYSTEM USING QR CODE (QUICK RESPONSE) AT PT. REDES JAYA PERSSADA. JITACS. 2021;1(1):20-29. doi:10.31849/jitacs.v1i1.6419