|•The most popular operating system to run CICS is OS/390.
|•The Red boxes show the services under control of CICS. These include the program API, Basic
Mapping Services (BMS), and Terminal Control
|•The White boxes show the services under control of the
operating system, in this case OS/390.
These services include communication protocols, such as TCP/IP, the databases and file systems that
store data, such as DB2, and the actual application program that will
accomplish the task.
|•The Blue box represents the outside user of the
system. This is the end user of the