UNO is a fair launch, low inflation, high-hash rate, rare issue cryptocurrency since 2013. Sha256, merge mined with Btc, high hash, 3 minute blocks.
The main goal of Callisto is to research and develop a reference implementation of a self-sustaining, self-governed, self-funded blockchain ecosystem and development environment. Callisto aims to establish a secure and contribution-friendly environment for further protocol development and improvements. It will rely on a built-in system of smart-contracts to achieve this goal.