Editing IBM System/38 (section)

===Control Program Facility===
{{main|Control Program Facility}}
The operating system of the System/38 is the ''Control Program Facility'' (CPF). CPF is not related to the [[System Support Program]] operating system of the IBM System/34 and System/36. CPF objects are files, programs, message queues, user profiles, and libraries. While CPF is considered to be the operating system of the System/38, it sits on top of the System/38 Machine Interface layer, and consequently much of the traditional operating system functionality of the platform is implemented in the Horizontal and Vertical Microcode.<ref name="inside-as400" />

The System/38 also has the distinction of being the first commercially available IBM [[Midrange computer]] to have a [[database management system]] (DBMS) integrated into the operating system.

The operational control language of the System/38 is called ''CL'', for [[Control Language]].  CL programs, similar in concept to [[shell script]]s, can be [[Compiler|compiled]] and executed [[Native mode|natively]].

The System/38 was designed with security built in as part of its architecture.  Each object or library can have access controlled on a user-by-user basis.  This has been continued and expanded throughout the AS/400 and iSeries computer lines.