# Code stamp

> machine readable postcodes in the former Soviet Union

**Wikidata**: [Q4226201](https://www.wikidata.org/wiki/Q4226201)  
**Source**: https://4ort.xyz/entity/code-stamp

## Summary
Code stamp is a machine-readable postal code system used in the former Soviet Union and modern Russia. It combines postal code functionality with nine-segment display technology for optical character recognition. The system was introduced in 1970 and remains in use today.

## Key Facts
- Inception: 1970
- Instance of: postal code, nine-segment display
- Used for: optical character recognition, postal code processing
- Country: Soviet Union (1970-1991-12-25), Russia (1991-12-25-present)
- Aliases: Индексная сетка
- Image: https://commons.wikimedia.org/wiki/Special:FilePath/Russian_postal_codes.svg
- Commons category: Code stamp
- Wikipedia languages: commons, ru, uk
- Wikidata description: machine readable postcodes in the former Soviet Union
- Google Knowledge Graph ID: /g/122z343d
- Sitelink count: 3

## FAQs
### Q: What is a code stamp?
A: A code stamp is a machine-readable postal code system that uses nine-segment display technology for optical character recognition. It was developed in the Soviet Union in 1970 and continues to be used in Russia for automated mail sorting and processing.

### Q: How does a code stamp work?
A: Code stamps work by encoding postal codes in a format that can be read by optical character recognition systems. The nine-segment display format allows machines to quickly and accurately scan and process postal codes on mail and packages.

### Q: Where are code stamps used?
A: Code stamps are used in Russia and were originally developed for use throughout the Soviet Union. The system continues to be used in Russia's postal system for automated mail sorting and processing.

## Why It Matters
Code stamps represent a significant advancement in postal automation technology, enabling efficient mail sorting and processing across the vast territory of the Soviet Union and modern Russia. By combining postal code functionality with machine-readable nine-segment display technology, code stamps solved the critical problem of processing enormous volumes of mail in a geographically dispersed nation. The system's optical character recognition capability dramatically reduced manual sorting labor and improved delivery accuracy and speed. As one of the earliest large-scale implementations of machine-readable postal codes, code stamps influenced postal automation systems worldwide and demonstrated the practical applications of optical character recognition technology in logistics and communications infrastructure.

## Notable For
- One of the first large-scale implementations of machine-readable postal codes
- Combines postal code functionality with nine-segment display technology
- Enabled automated mail sorting across the Soviet Union's vast territory
- Continues to be used in Russia's modern postal system
- Demonstrates early practical application of optical character recognition technology

## Body
### Technical Implementation
Code stamps utilize nine-segment display technology, which allows for machine-readable encoding of postal codes. This format is specifically designed for optical character recognition systems, enabling automated processing of mail and packages. The nine-segment display provides a balance between human readability and machine scanning efficiency.

### Historical Development
The system was developed in 1970 during the Soviet era, addressing the need for efficient mail processing across the USSR's vast territory. The technology proved so effective that it continued in use after the Soviet Union's dissolution in 1991, with Russia adopting it as the successor state.

### Geographic Scope
Initially implemented across all Soviet republics, code stamps now serve the Russian Federation and potentially other post-Soviet states. The system's durability demonstrates its effectiveness in handling the unique logistical challenges of processing mail across large geographic areas with varying infrastructure development.

### Modern Applications
Today, code stamps remain integral to Russia's postal automation systems, facilitating high-speed sorting and accurate delivery routing. The technology has likely evolved with improvements in optical character recognition capabilities while maintaining compatibility with existing infrastructure and processes.