The term "jö" refers to two main things found in Austrian contexts:
- JÖ is an Austrian school magazine, originally named Jung-Österreich. The magazine has existed since at least 1934 in some form, with the current title "JÖ" being used since the 1988/89 school year. It targets students in the 5th and 6th grades with content on environment, literature, history, science, and entertainment.
- Jö also refers to the "jö Bonus Club," a customer loyalty program in Austria started in 2019 by REWE and OMV. It allows customers to collect points ("Ös") for purchases to redeem for rewards. The program quickly became popular and is a major multi-partner loyalty scheme in Austria.
So depending on the context of your question, "jö" as a magazine has been around since the 1930s (with the current title since the late 1980s), and as a Bonus Club loyalty program, it has existed since 2019. If you want a specific answer, please specify if you mean the magazine or the bonus club.
