1Introduction
8Signal Box B: When Analog Became a Verb
2Chapter 1 — Prologue: The Return of a Word
9Chapter 6 — The Metaphor: Beyond Circuits
3Chapter 2 — Origins: From Proportion to Representation
10Chapter 7 — Epilogue: The Cult of the Continuous
4Chapter 3 — The Age of the Continuous
11Appendix A — Signals Timeline (1880–2025)
5Signal Box A: Thresholds of Discrete
12Appendix B — Glossary: The Analog Lexicon
