What is the difference between a physical and a transactional process?

You can see the steps of a physical process, while transactional processes are often hidden, such as in computers

Physical processes typically require more labor, while transactional processes are almost always highly automated

Physical processes are energy$-$intensive and generally are faster than transactional processes

Transactional processes have no physical content, so no part of the process is visible

Physical processes have steps that can be easily seen, while transactional processes steps often cannot be separated