> For the complete documentation index, see [llms.txt](https://book.runesterminal.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.runesterminal.io/2.-origins.md).

# 2. Origins

- [Segregated Witness (SegWit) Upgrade](https://book.runesterminal.io/2.-origins/segregated-witness-segwit-upgrade.md)
- [Taproot Upgrade](https://book.runesterminal.io/2.-origins/taproot-upgrade.md)
- [Inscriptions](https://book.runesterminal.io/2.-origins/inscriptions.md)
- [Ordinal Theory (Ordinals)](https://book.runesterminal.io/2.-origins/ordinal-theory-ordinals.md)
- [Rarity](https://book.runesterminal.io/2.-origins/ordinal-theory-ordinals/rarity.md)
- [Supply of Rare Satoshis](https://book.runesterminal.io/2.-origins/ordinal-theory-ordinals/supply-of-rare-satoshis.md)
- [Names](https://book.runesterminal.io/2.-origins/ordinal-theory-ordinals/names.md)
- [BRC-20](https://book.runesterminal.io/2.-origins/brc-20.md)
- [Why Runes?](https://book.runesterminal.io/2.-origins/why-runes.md)