CNA or Cyber/Nano Algorithms is the genetic material that determines what Transformers are like. Tinkering with it can be dangerous and can have long-lasting, negative effects. References to it, however, are very scarce in Fictions, and thus like the far more commonly-referenced sparks can only be said to definitively exist in continuities where it is actually mentioned. To date, the specific nomenclature "CNA" has only been used in one continuity.