I invoke them :]
* call - to send and await a reply * cast - to send and not await a reply
(though new data is created as a result of running the function, technically this is guaranteed to not affect the inputs due to the function having to be pure)
(perhaps this is excessively pedantic)
If it's the same function running on different data, then you are applying the function to the data. If it's the same data running in a different function, then you are applying the data to the function.
Invoking X sounds deliciously alchymistic, by the way.