IBM System/370 145 Manual page 167

• Capability of Qsing the interval timing facility in each partition
in a multiprogramming enviromnent. instead of only in one partition
• A cataloged procedures facili1:y which allows job control to be
stored in a procedure library so that it need not be placed in the
input stream
• Changes in file label processing that support the interchange of
tape volumes between DOS and
os
• A new data organiz.ation and access method called virtual storage
access method (VSAM) that is ciLesigned to offer more function and
better pel~formance for fileu flirith additions than ISAM
A Guide to the IBM System/370 Model 145
157