Shipping: Spend over GBP £50.00 to receive free shipping
201931st International Olympiad in Informatics - First Day Cover
| Miniature Sheet |
| GBP £1.20 |
| First Day Cover |
| GBP £1.50 |
- 10.08.2019
- Nariman Mammadzadeh
- Bobruisk Integrated Printing House, Bobruisk city, Belarus
- Offset
- 28x40 mm
About 31st International Olympiad in Informatics
The International Olympiad in Informatics (IOI) is an annual international informatics competition for high school students from various invited countries, accompanied by social and cultural programmes. It is one of the five international science Olympiads and is one of the most prestigious computer science competitions in the world.
Azerbaijan - Recommended stamp issues
WOPA+ recommended stamp issues
| Lunar New Year - Year of the Rabbit |
| Issued: 05.01.2023 |
| ›Jersey |
| Year of the Rabbit |
| Issued: 05.01.2023 |
| ›Guernsey |
| St. Elizabeth’s Church in Parnu |
| Issued: 06.01.2023 |
| ›Estonia |
| Medicinal Plants |
| Issued: 03.01.2023 |
| ›Romania |
| Veteran Tractors |
| Issued: 04.01.2023 |
| ›Aland Islands |
| Dimitrie Cantemir, 350th Anniversary of his Birth |
| Issued: 16.01.2023 |
| ›Romania |
| Music Giants VII - Iron Maiden |
| Issued: 12.01.2023 |
| ›Great Britain |
| Effigy of H.S.H Prince Albert II - Green Letter Rate |
| Issued: 03.01.2023 |
| ›Monaco |
| Honour Guard of the President of the Slovak Republic |
| Issued: 02.01.2023 |
| ›Slovakia |
