Meaning of CJSTLST in English
Canon Bubble Jet Printer Monitor, installed by the drivers for some of the Canon Bubble Jet printers (BJC600, BJC1000, BJC6200, etc.) and which sits in the System Tray where it enables the user to monitor print jobs, check ink levels, clean print heads, etc...
Useful as with modern inkjet printers that is often the only way to check ink cartridge levels.
Microsoft Windows task list Programs English glossary. Английский словарь - Список целевых программ Microsoft Windows. 2012