Runes are a writing system/characters for a system of writing. There are many runes signatures that have been discovered from the Scandinavian sailors we call Vikings to some unique variations discovered in the sacred sites of the Knights Templar. They have evolved over time since the 2nd century all the way to roughly the 1,800’s. But as for typical modern-day divination, there are only 24 which are commonly used.
Runic divination, “rune casting”, is not “fortune telling”. Rune casting works with the subconscious and is an ancient form of psychology.
When one does a runic reading, one usually addresses a particular issue, and examines the past, the present and the “future”, or rather “what will be if one follows the path one appears to be on”. The future is always perceived as mutable, changeable. The runic reading is done as an evaluation process, not as fortune telling. One has an opportunity to look at what has occurred in the past (regarding the issue being questioned), what is occurring right now, and what direction one is headed.