This is because they are linked by the single physical process that generated them.
History turned out to be not a single and straightforward process, but a complex tapestry of events.
Sleep is not a single process, as we know from our own experiences.
Thus there is no single process or capacity underlying the positive correlations between tests.
This is quite a lot to achieve with a single process.
Looking at her and falling in love was a single process.
A single process can start any number of threads.
The initial version supported a single process at a time.
Several processes can be joined into a single process with similar properties.
It ran as a single process with a small footprint.