Release 6.0 Removed support for the VSE VIO option .
  Removed support for executing VTAM/SWITCH as a VTAM subtask.
  Added feature to automatically expand the VTAM/SWITCH buffer pools.
  Added support for extended data streams on VTAM/SWITCH screens.
  Added option to customize PFKeys on VTAM/SWITCH screens.
  Added paging support for the alternate VTAM/SWITCH Session Selection screen.
  Added new VTAM/SWITCH Session Selection screen to combine application available and applications currently open.
  Added on-line administration panels to customize VTAM/SWITCH replacing the assembled tables.
  Created a new buffer pool above the 16MB line for many control blocks using 128 byte buffers.
  Improved the VTAM/SWITCH help screens.
  Added the FIND command to locate text on a VTAM/SWITCH screen.
  Added generic logical terminal support to the ENABLEL command.
  Added the DISABLEL command to disable a logical terminal.
  Added the PROFILE command to allow the user to customize their PFkeys and printer.
 

VTAM/SWITCH scripting changes.

1. Added option to the VTAM/SWITCH scripting TEST command to scan the entire line rather than a specific column.

2. Added conditional IF/GOTO logic.

3. Added scripting masking feature for the VTAM/SWITCH userid.
  Added support for VSE/ESA SAF security calls.
 

Added options to Control Table AXRACF parameter:

1. Not allow access to applications undefined to RACF.

2. ADM class users can use application group rather than RACF definitions.

3. RACF application resource class can be modified.

4. Number of active sessions with same application can be limited.
  TIMEOUT PURGE feature is now always active.
  Created EVENT #92, Physical Terminal Error
  Messages are assigned an expiration date and time and will be purged when they expire.
Release 5.5 Option to build the Application Selection menu from RACF definitions rather than the GSFDFAX table has been added, reference Control Table (GSFDFCT) parameter AXRACF.
  SHOW command is issued when VTAM/SWITCH is terminated to display the buffer usage.
  Option to generate multiple logical terminal definitions with a single definition has been added, reference Logical Terminal Table parameter TERMID.
  Scripting test has been changed to be case insensitive.
Release 5.4 Prints the user and terminal IDs along with the date and time for VTAM/SWITCH screen prints printed on a printer with the option TSTAMP=YES specified.
  Optional control table parameter, EXTDS, controls which extended datastreams VTAM/SWITCH will request the terminal to return when saving the screen's image.
  Optional feature to prevent a VTAM/SWITCH user from getting any mail or broadcast messages. Requires that the user be assigned to the message group "NOMAIL".
  Optional control table parameter, AXORDER, allows the applications listed on the Application Selection screen to be in the order listed in the Application table (GSFDFAP) or the Application Group table (GSFDFAX).
  Optional application table parameter, NETID, allows the VTAM NETID to be specified for an application. This allows duplicate application names on more than one VTAM network.
  Optional control table parameter, MSGMOD, for installations using the VTAM MSGMOD parameter.
  Optional control table parameter, TIMEOUT, has been changed to specify the amount of time, up to 999 seconds, that VTAM/SWITCH waits for a response from the physical terminal before attempting to terminate the non-responding task.
  All dates displayed by VTAM/SWITCH now include the century.
  A logging facility has been added to record all messages sent to the system console. (Sent to SYSLST for VSE, SYSPRINT for MVS). A new command, SEGMENT makes this log available for viewing in VSE installation or will "SPIN" the log for MVS. In addition, any VTAM/SWITCH internal tracing information is now written to this log rather than the console.
  Several VTAM/SWITCH messages have been changed to add parameter information to the message. For example, using the VTAM/SWITCH command "NEWCOPY GSFDFLG" produces message "(GSCNEWCA) ** NEW COPY OF MODULE LOADED **". This message has been changed to "(GSCNEWCA)** NEW COPY OF MODULE GSFDFLG LOADED **".
  New VTAM/SWITCH command, LIBRARYC, has been added to display the information in the current command table.
  Event logging has been added to record when certain VTAM/SWITCH events occur. (i.e., when logical sessions are opened and/or closed.) Installations may choose which VTAM/SWITCH events will be recorded.
  Optional control table parameter, BRDINT, allows the broadcast screen (GSFDIBR) to be initialized.
  Optional control table parameter, BRDCST, controls when the broadcast message is displayed to the user. This makes the control table parameter BRDNOA obsolete.
  In addition to the CLEAR key, the PF3 key will now clear a VTAM/SWITCH message or broadcast.
  Control table parameter USSMENU and user table parameter SSMENU has been changed to allow the original Session Selection screen to be compressed.
  Optional feature to route a message based on application ID has been added.
Release 5.2 Added year 2000 compatibility.
  Reduction in network traffic and dramatically improved response time on the VTAM/SWITCH OPEN screen. This screen has been changed from issuing synchronous requests for an application status to asynchronous requests. In addition, logic is in place to significantly reduce the number of requests issued. These changes will result in nearly instantaneous response on this screen. You may see a status of "checking" as an application status on some slower remote applications. This means the asynchronous request has not yet completed. Simply press the enter key again to update the status
  Elimination of potential VTAM/SWITCH hangs on the VTAM/SWITCH OPEN screen.

In very large networks, some Synchronous Application Status Requests were not being completed causing the SWITCH user to hang and potentially causing the entire SWITCH to hang as it reached its maxuser value. All Synchronous Application Status Requests have now been removed entirely from SWITCH.
  For MVS/ESA, OS/390 or VSE/ESA installations, most VTAM/SWITCH storage is allocated above the 16mb line. This will increase the number of users a single VTAM/SWITCH will support.
  VTAM/SWITCH feature to notify a user after a printing failure has been changed. When multiple VTAM/SWITCH screen prints are to be printed, the last user requesting the screen print will be notified instead of the first when a print error occurs.
  A new parameter has been added to the NEWS command to prevent VTAM/SWITCH messages or broadcasts from interrupting the user. This can be very useful while performing file transfers.
  Optional control table parameter, SELCHR, is available to allow any character, other than "C", to select an application on the VTAM/SWITCH SESSION SELECTION screen.
  Optional control table parameter, MSGNLG, is available to prevent any VTAM/SWITCH message from being routed to a user who is not currently logged on.
  For MVS TOP SECRET installations, the actual TOP SECRET message is returned to the user rather than the VTAM/SWITCH message generated from the SAF return codes.
  Optional control table parameter, PFKNO, is available to remove the PFkey line used on the bottom of VTAM/SWITCH screens
  New physical terminal table option for the FEED parameter to perform two form feeds after each VTAM/SWITCH screen print.
  Optional control table parameter, SCRCLR, is available to allow the VTAM/SWITCH scripting logic to process a CLEAR screen command from a VTAM application.
  New LIBRARYU parameter, ACTIVE, is available to limit the VTAM/SWITCH user display to only users currently logged on to VTAM/SWITCH
  Optional control table parameter, MSGNPR, is available to disable the VTAM/SWITCH print screen key for messages only.
  Optional control table parameter, PRTDEL, is available to delete the VTAM/SWITCH screen print request after a printer error.
  Application table parameter, LOGDATA, has been increased from 20 to 40 bytes.
  Optional control table parameter, CLRSGN, has been changed to specify the number of unsuccessful VTAM/SWITCH signon attempts before the terminal will be released by VTAM/SWITCH to VTAM USSTAB.
  Optional control table parameter, BRDNOA, is available to prevent the automatic VTAM/SWITCH broadcast display when issued.
  Optional control table parameter, LGAPPL, is available to determine whether the value specified for logical terminal table APPL= parameter is the application's ACB or ALIAS name.
  Optional control table parameter, APPLVR, is available to determine whether the applications on the VTAM/SWITCH application selection screen are displayed vertically or horizontally.
  Optional control table parameter, DYNTYPE, is available to determine how VTAM/SWITCH will generate the TERMTYP for all dynamic physical terminals.
  The VTAM/SWITCH group name will be displayed with the message for all VTAM/MESSAGE messages sent using the ROUTE G,xxxx command.
  Highlights active applications on the VTAM/SWITCH application selection screen.
  Optional control table parameter, CLRCMD, is available to clear the VTAM/SWITCH command line whenever an error message is returned on the VTAM/SWITCH application selection or
session selection screens.
  New application group table parameter, MAXSESS, is available to restrict the number of logical sessions per application.
  Control table parameter, HIDEOFF, has been changed to allow a HIDE user to return to the VTAM/SWITCH signon screen rather than the VTAM USSTAB after closing their current session.
  Improved the PURGE user, TASK facility. VTAM/SWITCH will close the physical terminal and wait for the hung task to complete before cleaning up the internal control blocks.
  Automatic purge facility for hung task. Using the existing timeout feature, VTAM/SWITCH will close the physical terminal (based upon the control table TERMERR parameter), close all logical terminals or the current logical terminal, and wait for the hung task to complete before cleaning up the internal control blocks for any task older than 60 seconds.
  Allows for forward and backward paging on any VTAM/SWITCH display screen by number of lines rather than by full pages.
  Applications displayed on the applications selection screen are now in the order of the application group table.
  New VTAM/SWITCH commands, LIBRARYG and LIBRARYH, have been added to display the application group and physical terminal group tables respectively.
  "Point and Shoot" has been added to the session selection screen. Applications can be selected by placing the cursor and pressing enter.
  Paging for the VTAM/SWITCH application selection and session selection screens has been added.
  TOP SECRET for VSE support is now available
Release 5.1 Options BUF128W and BUF128M monitor the 128 byte buffer usage.
  Optional IMMED parameter to the SHUT command to immediately terminate VTAM/SWITCH
  Optional LOGMODE parameter in the LOGICAL Terminal Table (GSFDFLG) to be used in the BIND when opening a new session.
  Applications may be restricted to only the logical terminals defined with the APPL parm
  Optional physical terminal query to determine screen sizes and terminal type
Release 5.0 Errror recovery has been improved. VTAM/SWITCH's outstanding VTAM request, hung terminals, may be canceled using the PURGE command
  VTAM/SWITCH messages may be printed.
  A new SESSION SELECTION screen is available. This screen displays the opened sessions and a list of applications available to the user.
  Masking is available for userids and physical terminal ids.
  An alias may be defined for any printer.
  Added optional new password verification for external security installations.
  Added optional timeout feature for users in BREAK mode
  MVS modify command is supported for VTAM/SWITCH's console interface
  LIBUX command is enhanced to display the user's logical sessions.
  LIBPX command was added to display all physical terminal information
  Printer control has been enhanced with options EJECT, FEED, LINESKP, and TSTAMP.
  Optional VTAM