However, be aware that expat's answer only includes IBM utilities. If your site uses other software vendors, such as CA or Compuware or ASPG or Phoenix or ...., then there is no single comprehensive source that lists all utilities available at your site. Each vendor writes and maintains its own documentation and hence you must look at each vendor's documentation.
Hey Guys thanks a lot. Robert, Thanks for the information about different sw vendors. Expat, thanks for the rely, while do as u said i hit another site http://publib.boulder.ibm.com/infocenter/zos/v1r12/index.jsp which was having all the systems and their specific utilities (for batch/rexx/java) also.