notty is a virtual terminal like xterm, gnome-vte, sh, or rxvt. Unlike these programs, notty is not intended to emulate a DEC VT-series physical video terminal, or any other physical device. Instead, notty is an experimental project to bring new features to the command-line which would not have been possible for the physical terminals other terminals emulate. Current command-line tools have stagnated (if you prefer, 'stabilized') around the ECMA-48/ISO 6429/ANSI X3.64 escape code protocol, which is defined on the basis of the capabilities of 1980s video terminal devices. Essentially all terminals in use today are virtual terminals being run on devices which are significantly more capable than these ancient machines, and yet the terminal environment has not kept pace with these developments. The last revision of the ANSI escape code protocol was released in 1991.