IBM System 38. The System/38 is a discontinued minicomputer and midrange computer server platform manufactured and sold by the IBM Corporation. IBM announced the System/38 in 1978.The System/38 has 48-bit addressing, which was unique for the time, and a novel integrated database system. It was oriented toward a multi-user system environment. At the time, the typical system handled from a dozen to several dozen terminals.
The system includes a central processing unit with 512K, 768K, 1024K, 1280K, or 1536K bytes of main storage, It includes a memory management unit supporting demand paging, used by the system software to implement a single-level store architecture.