บาร์โค้ด 1 มิติ
หรือเรียกอีกชื่อว่า:
linear barcode
1D code
Traditional linear barcodes (UPC, EAN, Code 128, Code 39) that encode data in bar width variations along one dimension. Limited to ~20-25 characters. QR codes were invented specifically to overcome 1D barcode capacity limitations.