Programs designed to monitor user activity. They may be used with or without consent. Because it is sold commercially, many anti-virus vendors do not detect them. The most common form of a commercial monitoring tool comes in the form of a keystroke logger, which intercepts keystrokes from the keyboard and records them in a log. This can then be sent to whoever installed the software, or keylogger, onto the machine. Some Commercial Monitoring Software may take screenshots or video and send the information to an outbound connection.
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From their website:
SENTRYCAM? watches and captures screenshots of every area of the Internet. It captures games, chat rooms, generic websites, e-mail read and written online and it even follows a child into private chat rooms or private message windows. You can let your child know that SentryCam is watching or you can run the program in stealth mode. This invaluable tool empowers you, the parent, to head-off internet dangers before they become a problem and help you to guide your child's use of the internet.