AT&T started a standardization effort with Bell and the DoC. AT&T contributed two major additions to the system; the ability to define your own character sets, and the ability to wrap up multiple graphics commands into a "macro". The former provided not only or international characters, but also for the creation of small graphics that could be sent with a low transmission cost, which is useful in certain roles where the graphics can be arranged in a grid, like a chessboard. The later allowed the programmers to create a commonly used graphical element, the AT&T logo for instance, and save it to a macro. The graphic can then be recreated with a single instruction in any page that needed it.
AT&T started a standardization effort with Bell and the DoC. AT&T contributed two major additions to the system; the ability to define your own character sets, and the ability to wrap up multiple graphics commands into a "macro". The former provided not only or international characters, but also for the creation of small gra:phics that could be sent with a low transmission ,cost, which is useful in certain roles where the graphics can be arranged in a grid, like a chessboard. The later allowed the programmers to create a commonly used graphical element, the AT&T logo for instance, and save i?t to a macro. The graphic can then be recreated with a single instruction in any page that needed it.