This document discusses parallel and concurrent features in Perl 6. It covers implicit parallelism enabled by operators like hyper operators and junctions. Explicit parallelism using feeds, channels, and promises is also discussed. Promises allow asynchronous and parallel execution, and examples are given using Promise.in to run code in threads and the sleep sort algorithm. Further parallel constructs like schedulers, suppliers, signals, threads, atomic operations, locks and semaphores are also mentioned for additional exploration.