Postal barcodes
The Singapore Postal Service is using the 4 State barcode to speed mail sorting. This 4 State barcode encodes a 6 digits number and has a checksum appende...
Fri, 18 Oct, 2024 at 9:23 PM
OMR marks are horizontal or vertical black solid lines found on printed mailing sheets. The mail processing machines check for these lines on every page f...
Fri, 18 Oct, 2024 at 9:24 PM