EOL:Website-activity logs.curator activity log.unlock.an unknown taxon unlocked/qqq

The technical term "background processing" is describing a computer process that runs "behind the scenes" (i.e. in the background) and without user intervention. Typical tasks for these processes include logging, system monitoring, scheduling. Here it is used for time-intensive changes in the database (moving data from one page to another, per request by the curator).