There are two ways to control access to libraries required by applications. If you define the libraries using the library function of Application Manager, the libraries required by an application will be dynamically allocated when a user selects that application. Application Manager accesses the libraries using the ISPF LIBDEF service or the TSO/E ALTLIB command, or by dynamic allocation. See for more information about using the Application Manager library function.

If you want to permanently allocate the libraries required by an application, you can use either LOGON procedures, or start-up CLISTs/REXX execs. The following table lists the advantages and disadvantages of the different ways you can concatenate the libraries in LOGON procedures or start-up CLISTs/REXX execs.