During report, people continue to report that their patient is on AC or SIMV or PCV.
When people mention AC, they mean AC-VCV.
When people mention SIMV, they mean SIMV-VCV.
When people mention PCV, they mean AC-PCV.
This likely relates to the historical development of modes. When there was originally PCV (aka AC-PCV) and then AC (aka AC-VCV) and then SIMV (aka SIMV-VCV).
However, with the advent of microprocessors, we have a myriad of ventilatory mode-types.