What is Plunder? PLUNDER IS AN OPERATING SYSTEM Plunder is a new operating system paradigm, built using pure functional programing, type systems, and the actor model. Plunder will ultimately supplant UNIX, the filesystem, and the database as the primary organizational structures of computing. PLUNDER IS LISP A minimal, functional evaluation model (PLAN). A language bootstrapped using macros (Sire). An image-based software paradigm: a Lisp Machine for the modern era. A name in the Scheme tradition: Guile, Larceny, Stalin, Racket, Plunder. PLUNDER IS MAXWELL'S EQUATIONS OF SOFTWARE The PLAN specification fits on a single page. The production PLAN interpreter is just 2500 lines of assembly -- no libc. The Sire compiler is 2000 lines of pure Sire. PLUNDER IS HASKELL A lazy, typed, purely functional programming system with monadic IO. An imperative DSL for performance-sensitive code. (like the ST monad, but lower level). PLUNDER IS ERLANG An actor model, where processes communicate by message passing with no shared mutable state. Extremely lightweight processes, mailboxes, error handling, and supervision trees. Per-process private heaps and private GC. Message passing without copies. PLUNDER IS URBIT Plunder supports *permanent processes* backed by disk, which transparently resume on restart. Processes on disk are represented as a closure for the state, and all of the inputs since then. All code is data -- totally normal data. Data which can be hashed and serialized. PLUNDER IS BIG Plunder can support terabytes of live data. There is no need to serialize data or store it in files, everything remains in normal data structures on a shared heap. Most systems fall prey to GC performance issues at scales orders of magnitude smaller, but Plunder does not. This is possible without complex implementation strategies. It is achieved through architecture; the entire system is designed around this goal.