What was the first RPG?

[ekman@lysator.liu.se (Fredrik Ekman)]

I am wondering what the very first computer RPG was. I used to believe
that it was Rogue (released in 1983, I think), but the other day I
happened to take a look at my old Temple of Apshai box and found that it
was copyrighted in 1983, so I suppose neither of these games were
influenced by the other, in spite of many similarities.

Were there other, even earlier, games that the above two were inspired
by, or did they just happen upon the same concept at the same time?

  /F