Postal services - Mail item processing - Optical characteristics for processing letters
Postal services - Apertures of private letter boxes and letter plates - Requirements and test methods
Postal services - Quality of services - Measurement of the transit time of end-to-end services for single piece priority mail and first class mail
Postal services - Quality of service - Complaints handling principles
Postal services - Quality of service - Measurement of the transit time of end-to-end services for single piece non-priority mail and second class mail
Postal services - Digital postage marks - Applications, security and design
Postal services - Quality of service - Measurement of the transit time of end-to-end services for bulk mail
Addressing - Part 4: International postal address components and template language (ISO 19160-4:2017)
53,361 distinct reference strings indexed from official source snapshots accessed on 19 October 2026. Includes earlier editions. The index and publisher collections have different coverage. See sources and coverage.