1. Introduction. - 1. 1. The MPI Library. - 1. 2. Arch. - 1. 3. An Overview of Arch. - 2. Threads-Concurrency. - 2. 1. Threads. - 2. 2. S_Threads. - 2. 3. Communication between Son and Father. - 2. 4. State-Transition Diagram. - 2. 5. ARCH Program Organization. - 3. Synchronous Point-To-Point Communication. - 3. 1. Channel Class Organization. - 3. 2. Local Channels. - 3. 3. Inter-Process Channels. - 3. 4. Non-deterministic Many Way Reception. - 3. 5. Atomicity. - 4. Asynchronous Point-To-Point Communication. - 4. 1. Asynchronous Versus Synchronous. - 4. 2. Channels for Asynchronous Point-to-Point Communication. - 4. 3. Asynchronous Communication Functions. - 5. Global Data-One-Sided Communication. - 5. 1. Motivation. - 5. 2. Outline. - 5. 3. The Class Global. - 5. 4. Example. - 6. Global Completion Detection. - 6. 1. Problem Setting. - 6. 2. Detecting Completion via Counting. - 6. 3. Implementing Counters Algorithm. - 6. 4. ARCH Implementation of Counters Algorithm. - 7. Distributed Mutual Exclusion. - 7. 1. Problem Setting. - 7. 2. Algorithm For Distributed Mutual Exclusion. - 7. 3. ARCH-based Implementation. - 8. Parallel A* Algorithm. - 8. 1. Sequential A* Algorithm. - 8. 2. A* Parallel Implementation. - 9. Global Pointers-Spread Arrays. - 9. 1. Global Pointers. - 9. 2. Spread Arrays. - 10. Image Segmentation. - 10. 1. Region Growing: Sequential Algorithm. - 10. 2. Parallel Region Growing. - 10. 3. Experimental Results. - References. Language: English