By default C++ executables are not thread-safe, that is their correct work during simultaneous execution by multiple threads is not guaranteed.

Modern processors are even capable of executing multiple 'fixed point' instructions in parallel with the simultaneous execution of a floating point instruction.

Another technique called simultaneous multithreading (used in Intel's Hyper-threading technology) can simulate simultaneous execution of multiple processes or threads.

Laboratory studies often use the simultaneous execution of two different tasks (dual tasks) to simulate the more realistic situations where humans time-share activities.

The Combat Mission games are a mixture of turn-based strategy and simultaneous real-time execution.

Such simultaneous execution, if perfect substitutes are involved, minimizes capital requirements, but in practice never creates a "self-financing" (free) position, as many sources incorrectly assume following the theory.

This was the largest of several simultaneous executions of prisoners of war.

During construction, individual floors were assembled on the ground and then elevated, allowing for simultaneous execution of the shell and the finished work.

Provided batch-processing and simultaneous execution, subsequently enhance to provide a multitasking mode.

Here, the two disparate workloads have been scheduled for simultaneous execution on a single core, thereby freeing up the second core entirely.