links to this page: Squeak Threading Model Tom Koenig's Rooks Nest Thread-safe Squeak's threading architecture -- why can't Squeak do SMP yet Squeak Architecture Actors for Squeak Smalltalk Documentation Process ProcessorScheduler Scheduler Swiki Page List Using Multiple OS Threads Alternative Thread Schedulers Does Squeak use green threads or native threads? Are Squeak threads preemptive?