IBM mainframe termination
Cobol (Common Business Oriented Language), a business-oriented programming language, appeared in 1952. It is a major programming language on large machines such as IBM mainframe, TANDEM mainframe, HP mainframe, Fujitsu mainframe. Refer to http://www.legacyj.com/cobol/cobol_history.html, or IBM website.
First, IBM mainframe (Mainframe)
IBM has started from 2000, and the mainmap is referred to as IBM ESERVER ZSERIES, the Z system column means that the never dose (ZERO) is used for Mission Critical Application (24 * 7). Most of the domestic and foreign banks, or larger branches, mostly used IBM mainframes, individuals with Tandem None-Stop Cobol (Tianthen Company was combined with HP).
The main model of IBM has an ES9000 (large-scale model) and System / 390 (S / 390).
MVS, VSE, VM, OS / 390 are some operating systems used on IBM mainframe.
IMS is a major large database (hierarchical database, non-relational database) used on IBM mainframe. IBM large-scale new software is recommended to use the Trend of DB2 UDB databases.
CICS (CUSTOMER Information Control System) Read as [Kiks] is an Application Server or a Transaction Server, a backend database connection and online transaction control on the IBM host, a bit similar to Microsoft WebSphere Application Server of MTS or IBM.
COBOL is the main programming language of the IBM mainframe. JCL is a job control language on the mainframe.
Second, IBM Medium Machine (Midrange)
The new name is IBM EServer iSeries. The i series is the meaning of business intelligence (Intelligence). Used in medium enterprises. The main model of IBM medium machine is AS / 400, the operating system is OS / 400, the database is mainly DB2 universal database, and the programming language is mainly RPG or COBOL. RPG is a programming language that is very like COBOL.
Third, IBM small machine (Small Computer)
The new name is IBM ESERVER PSERIES. The P series is the meaning of Performance. For small and medium-sized enterprises. The main model of IBM small machine is RS / 6000, the operating system is AIX (IBM UNIX system), the database is mainly DB2 / Oracle / Sybase, etc., the programming language is uncertain, mostly C / C / Java, etc.
Fourth, IBM PC server
The new name is IBM EServer XSeries, which is previously called IBM Netfinity Server. The X series is the meaning of the Intel X86 series CPU. For department-level servers.
The above is my knowledge of some knowledge, there may be errors, for reference only. Visit the IBM website in detail.
