IBM System/34 and System/36 Screen Design Aid

Screen Design Aid (System/34 and System/36) (SDA) is a utility for the IBM System/34, System/36, System/38, and AS/400 (iSeries) midrange computers.

This article refers to the S/34 and S/36 implementations of SDA. S/38 and AS/400 use a different SDA with different syntax and characteristics. See the AS/400 article for more about these midrange computers.