R.E.K. 3000

The R.E.K. 3000  is a post-skeletron informational accessory which combines the functionalities of its ingredients, the Radar, Tally Counter, and Lifeform Analyzer, providing information about the number of nearby enemies, the player's enemy kill count, and nearby rare creatures.

Trivia

 * R.E.K. may stand for the words Rares, Enemies, and Kills, the three displayed functions of this item.
 * It is possible that the R.E.K 3000 is a reference to the Garden of Eden Creation Kit, commonly abbreviated as "G.E.C.K.", and the Pip-Boy 3000 from the post-apocalyptic role-playing video games series .

History
GUYS I THINK R.E.K STANDS FOR rare, entity's, and kill or rare entities, amount of entities , and kill count if you ever see this message sincerely random terraria gamer.