Koodu QR, aha zuru oke nke koodu nzaghachi ngwa ngwa, nke a makwaara dị ka "koodu nzaghachi ngwa ngwa", bụ koodu akụkụ abụọ nwere matriks, nke ụlọ ọrụ ụgbọ ala Japan Denso Wave mepụtara na 1994, yana onye bụ onye mepụtara koodu QR Yuan Changhong. Ya mere a marakwa dị ka...
GỤKWUO