Object Access Method

High Quality Content by WIKIPEDIA articles! Object access method is an access method under z/OS which is designed for the storage of large numbers of large files, such as images. An access method is a function of a mainframe operating system that enables access to data on disk, tape or other external devices. They were introduced in 1963 in IBM OS/360 operating system. Access methods provide an API for programmers to transfer data to or from device, and could be compared to device drivers in non-mainframe operating systems.