Adobe Type Manager was designed to provide scalable fonts on early Mac and Windows 3.0 systems that did not provide similar functionality natively. ATM is required by a number of graphics application originally designed to work in these environments. ATM is packaged as a "lite" installable runtime. Later releases offer a "Deluxe" version with extra font management abilities. Other OSes including NeXTSTEP, DESQview, and OS/2 come with ATM functionality built-in.