It seemed like everywhere I went on this site yesterday talked about maps and territories. I don't recall exactly where, but I thought it was rightly attributed to Alfred Korzybski (AK). The map and territory heuristic is, AFIK, AK's coinage, and I just assumed all the map and territory references alluded to a strong Korzybskian foundation.

E-prime was the invention of someone else (I forget his name-easily Googleable or Wikipediable) but closely followed AK. I find it impractical for language, but more helpful for reasoning.