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This talk is an overview of library operating systems that focuses on the benefits to application developers. Interfacing with lower-level systems using familiar abstractions, rather than alien ones, is a thing of joy -- in testing, reasoning, modification, and participation. Operating systems programming doesn't have to be an arcane black art requiring a totally different set of skills from your day-to-day application development. It can be comprehensible, documentable, testable, and hackable with your everyday tools. Operating systems hacking is in reach!
Examples (when appropriate) will be given using the MirageOS library operating system, which is written in OCaml, but principles discussed are applicable to other library operating systems projects including IncludeOS in C++, HaLVM in Haskell, and many others.