const IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE = $8000;
Use the $SETPEOPTFLAGS directive: {$SETPEOPTFLAGS $8000}
This indicates to Windows that the Delphi application is Terminal Services aware and safe for use as a TS app.
Documentation in PE (portable executable) header flags (ms-help://borland.bds5/devcommon/peheaderflags_xml.html)
See also: Terminal Services Programming Guidelines.
In 2017, with the release of Delphi 10.2 Tokyo, Embarcadero introduced a specialized implementation of the Observer pattern into the System.Classes unit. While it has been in the wild for 9 years, it remains a "hidden" architecture for many, primarily because it serves as the invisible engine behind LiveBindings. Other than live bindings, you can also use the Observer pattern as a way to update component settings to the Windows registry, an .ini file, or persist it elsewhere.
System.Classes