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.
Absolute Key Logger is a small program that records all keystrokes into a log file, so that you can use this data later. It is a program that is installed by the user of a computer to explicitly monitor the activity of other users. These types of program can be installed using stealth tactics to hide themselves from other users.
From their website:
"Absolute Key Logger is a hidden keystroke recorder. Absolute Key Logger records all keyboard key strokes into a log file, so that you can use this data later."