Kanban - Project Management

Kanban 
Kanban is a new technique for managing a software development process in a highly efficient way. Kanban underpins Toyota's "just-in-time" (JIT) production system.
Formulated by David J. Anderson 

Short history - https://leankit.com/learn/kanban/what-is-kanban/
Wikipage - https://en.wikipedia.org/wiki/Kanban
GoodRead - https://en.wikipedia.org/wiki/Kanban_board

Bitcoin

Bitcoin 
a type of digital currency in which encryption techniques are used to regulate the generation of units of currency and verify the transfer of funds, operating independently of a central bank.

Full details here - https://bitcoin.org/en/faq
Wikipage - https://en.wikipedia.org/wiki/Bitcoin
GoodRead - http://nakamotoinstitute.org/mempool/who-controls-bitcoin/