For each of the following characteristics, write an adequately matching acronym or a single/couple of word(s):

1. A parallel programming model derives concurrency from a set of communicating sequential processes each with a separate address space ________

2. A parallel library call which needs to be called by all executing threads or processes ____________

3. A parallel architecture in which each node has a separate address space ________

4. An execution model in which each process gets and executes a separate copy of the same program _____________

5. An operation by a thread or a process and for which the invoking thread/process does not wait for the completion of the operation ____________

6. A parallel operation that must be executed by all processes (or threads) _ ______________

7. A synchronization mechanism in which all processes or threads must reach the same point in the code before any of them proceeds any further ____________

8. A parallel architecture in which all processor nodes physically share one memory subsystem __________________

9. A parallel programming model in which the programmer is given the illusion that he/she has a shared memory system __ __________

10. A parallel architecture in which each processor has a local memory that is shared with the rest of the processors __________

11. A parallel programming model in which the programmer is given the illusion that he/she has a distributed shared memory system. __________

12. A synchronization mechanism which is used to make sure that a critical code section is only executed by a single thread at a time ____________

13. A programming model which can be described as one-sided ______________

14. A parallel computer architecture in which all processing elements perform the same instruction in the same time _____________

15. A parallel computer architecture in which synchronization is done via software ____________

16. An inter-process (or inter-thread) communication call at which the process will stop till the operation is completed by all executing processes_______________

17. A parallel architecture in which synchronization is done in the hardware ______________