Editing VSE (operating system) (section)

==User interfaces==
===Job Control Language (JCL)===
A [[Job Control Language]] (JCL) that continues in the [[DOS/360 and successors#Job control|positional-parameter orientation of earlier DOS systems]] is VSE<sup>n</sup>'s [[batch processing]] primary user interface.<ref>{{cite web
|title=Introduction to the New Mainframe: IBM z/VSE Basics
|url=https://www.redbooks.ibm.com/redbooks/pdfs/sg247436.pdf
|date=March 1, 2016}}</ref><ref>{{cite web
|url=https://docops.ca.com/display/IDMS19/Storage%2BConsiderations%2BFor%2Bthe%2BBatch%2BExternal%2BInterface
|title=Storage Considerations For the Batch External Interface}}</ref> There is also another, special interface for [[system console]] operators.<ref>{{cite web 
|title=Hints and Tips for z/VSE 5.2
|url=http://public.dhe.ibm.com/eserver/zseries/zos/vse/pdf3/zvse52/hintdmm2.pdf}}</ref>

===Beyond batch===
VSE<sup>n</sup>, like z/OS systems, had traditionally provided [[3270 terminal]] user interfaces. However, most VSE<sup>n</sup> installations have at least begun to add [[Web browser]] access to VSE<sup>n</sup> applications. VSE<sup>n</sup>'s [[Internet protocol suite|TCP/IP]] is a separately priced option for historic reasons, and is available in two different versions from two vendors. Both vendors provide a full function TCP/IP stack with applications, such as telnet and [[FTP]]. One TCP/IP stack provides IPv4 communication only, the other IPv4 and IPv6 communication. In addition to the commercially available TCP/IP stacks for VSE<sup>n</sup>, IBM also provides the Linux Fastpath method which uses [[IUCV]] socket or [[Hipersockets]] connections to communicate with a Linux guest, also running on the mainframe.

Using this method the VSE<sup>n</sup> system is able to fully exploit the native Linux TCP/IP stack.<ref>{{cite web|url=http://enterprisesystemsmedia.com/article/the-z-vse-fast-path-to-linux-on-system-z|title=The z/VSE Fast Path to Linux on System z|access-date=2013-10-16|archive-date=2013-10-22|archive-url=https://web.archive.org/web/20131022233654/http://enterprisesystemsmedia.com/article/the-z-vse-fast-path-to-linux-on-system-z|url-status=dead}}</ref>

IBM recommends<ref name=Recommends>{{cite web
|quote=Both z/VSE and Linux on IBM Z run as z/VM Guests in the same z/VM-mode LPAR .... The use of a z/VM-mode LPAR is recommended.
|url=http://public.dhe.ibm.com/eserver/zseries/zos/vse/pdf3/wavv13/LinuxFastPath.pdf
|title=z/VSE Fast Path to Linux on IBM Z}}</ref> that z/VSE customers run [[Linux on IBM Z]] alongside, on the same physical system, to provide another 64-bit application environment that can access and extend z/VSE applications and data via [[Hipersockets]] using a wide variety of [[Middleware (distributed applications)|middleware]]. [[CICS]], one of the most popular enterprise [[transaction processing system]]s, is extremely popular among VSE<sup>n</sup> users and now implements recent innovations such as [[Web services]]. [[IBM Db2|Db2]] is also available and popular{{Clarify|date=October 2020}}.