What Type Of Scripting Is This?

Here is a random example. I'm trying to figure out what this is called:

56/23/26/56/38/54/39/12/23/34/45/56/67/78/89/90

I saw that type of thing in a few scripts, where it was the only thing in the entire script.

If I can learn how to use it, I could encrypt a script. I've noticed that these types of things actually do something in-game.

I'll keep looking in the wiki.