The first self-adhesive postage stamp was issued by the Repulic of Sierra Leone in 1964.
Self-adhesive stickers were first invented in the 1930s by R. Stanton Avery, who founded what would become the Avery Dennison Corporation. In 1935, Avery created the first commercially viable self-adhesive label, using a simple hand-constructed machine in a loft above a garage in Los Angeles.
Six months after the implementation of ZIP codes in 1963, every address in the US had been assigned one.
Zip codes, also known as postal codes, are a system of numerical codes that are used by postal services to facilitate the delivery of mail and parcels to specific locations. The history of zip codes goes back to the early 20th century when the United States Postal Service (USPS) recognized the need for a more efficient mail delivery system.
