Meaning of CJSTCOM in English
Canon Bubble Jet Status Monitor. From what we can make out this task sits in the background and relays status information between the printer itself and CJSTLST below, but we are not completely sure about that.
Since we are not certain about the role of this task, our recommendation is to leave it alone.
Microsoft Windows task list Programs English glossary. Английский словарь - Список целевых программ Microsoft Windows. 2012