This executable is part of the package 'mate-control-center': The MATE Control Center.
The MATE Assistive Technology preference is used to enable assistive technologies in your desktop. You can use gnome-at-properties to specify that the following assistive technology applications start automatically when you log in:
o On-screen Keyboard
This program accepts the standard MATE and GTK options.
Latest version of the MATE Desktop User Guide for your platform.