This is the rune set used by the Xenonite aliens in the History of a Galaxy book series. This font allows a user to create text in the language Xenonite Standard. Letters not in the Xenonite alphabet are duplicated from similar sounding letters. The letter is keyed by its initial - for example "X" creates the "Xa" rune - with the exception of "H" which will create "Tho" (to differentiate from "T" which creates "To").
Note that the rune "Pe" ("P") is only found in the Thoronite dialect.
Bungie Marathon terminal font recreation awaiting contact with right owner to make it public. (if any interest)