Files with jcl extension are used for Job Control Language, developed by IBM for mainframes.
JCL file extension - IBM Job Control Language file format
What is jcl file? How to open jcl files?
File type specification:
The jcl file format is associated with Job Control Language (JCL), a scripting language used on IBM mainframe operating systems.
The jcl file stores source code written in IBM JCL language.
This jcl file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.