Model or Archetype of a Functioning Invention
This page is the CodyCross answer for the clue below from Past and Present Tech, Group 1447, Puzzle 4 (Memory Chip).
Question is: Model or Archetype of a Functioning Invention
and the answer is: PROTOTYPE
Word Meaning:
PROTOTYPE — An original form or object which is a basis for other forms or objects (particularly manufactured items), or for its generalizations and models.
Definitions from Wiktionary.