Planet Kubb
The notation system starts with a character system for recording all actions in the game. As such, the characters all map to a single action. F indicates a field kubb was hit. I indicates a kubb was thrown in. Many of the actions also accept an integer modifier. So 2F means two field kubbs were hit. Some actions allow a 0 modifier, like 0i for indicating no kubbs were thrown in.
The notation system also allows placing a player token in front of the action separated by a colon (:). The player token is any set of letters (a-z, A-Z). So, j:2F means player j hit two field kubbs. It is recommended to keep the player tokens short so it is easier to score during the game. The colon is optional on the Scoresheet.