In my company I introduced stickers on working machines. We have a lot of developers with different skillsets spread over the entire campus. There are many departments sharing similar technology stacks and needed skills. This helps people to get together if they have questions or ideas they want to verify or share with others not in their department for example. Got a problem with a particular thing in Erlang, Redis, Yocto, NodeJS, Go, Linux or something else? Just approach the guys that have appropriate stickers and get together and exchange some of that sweet knowledge. While on it they might notice yours and do the same.