This is the entry point for developers. With IOTA 1.5, IOTA is becoming production ready, and there is a clear path towards full decentralization with IOTA 2.0. Partners, academia, and developers can now start to build on the Tangle and plan for the future. There will be no significant changes on the way to IOTA 2.0, so most of the IOTA 1.5 codebase, including tools, libraries, and APIs, can be used with IOTA 2.0. Projects built on today’s codebase will not require major refactoring later on. If you want to start developing with IOTA Smart Contracts Protocol (ISCP) you need to choose the 2.0 network.