
Chapter 3. z/VSE overview 105
A large variety of utility programs
For example, the DITTO/ESA program, which is used extensively to copy
tapes, and view and edit data, is a licensed product.
A large number of complementary VSE-related products are available from ISVs.
For example, ISVs offer products that provide common systems management
functions, such as job scheduling, console management, tape/DASD
management, performance monitors, and application development tools.
3.9 Middleware for z/VSE
Middleware is typically software between the operating system and an end user
(or end-user application). It supplies major functions not provided b