Coil zipper - Wikipedia

Astral Disaster - Wikipedia

Zipper / YKK FASTENING PRODUCTS GROUP

Knot - Wikipedia

Grove - 2-Channel Inductive Sensor(LDC1612)

Zipper Identification - iFixit

Rail – Minecraft Wiki

Some absolutely gorgeous cable lacing from Wikipedia. Link in

How to Replace a Zipper Pull: 13 Steps (with Pictures) - wikiHow

3 Ways to Stop a Zipper from Unzipping Itself - wikiHow

Coil Zipper Size - iFixit

Zipper - Wikipedia

YKK - Wikiwand

Metal Zippers 10 Pcs - #3 Antique Brass Close-end, 6 inch/15 cm - by BEAULEGAN

Zipper - Wikipedia

Sum from i=1 to N of ik^i (for Helix-Coil zipper model)