Later innovations such as IBM's Administrative Terminal System (ATS), Conversational Remote Batch Entry (CRBE), Conversational Remote Job Entry (CRJE) and Time Sharing Option (TSO) made WYLBUR less relevant for IBM users and gradually replaced it.
ORVYL and WYLBUR were used at the Stanford Linear Accelerator Center (SLAC), the European Organization for Nuclear Research (CERN), the U.S. National Institutes of Health (NIH), and many other sites.
Retired from most sites in the late 1990s owing to concerns about Y2K issues, they remained in use at NIH until December 2009.
This was roughly the same time that third-party time-sharing systems such as MTS became available and the under the radar development effort of CP-67 at IBM's own Cambridge Scientific Center took place.
WYLBUR provides compressed Partitioned Data Sets (PDSs, aka libraries) to save disk space.
In MVS, source code is typically stored as a sequence of card images (80 character lines).
Even when data, e.g., source code, are stored as variable blocked (VB), space could be wasted on strings of embedded blanks.
Wylbur has the ability to convert line numbers between edit and IBM data sets, either as scaled integers or with an explicit decimal point.
A range can be specified as a combination of A pattern is similar to a regular expression, but the syntax is closer to that of SNOBOL than to that of Unix or Perl, there is no backtracking and only the NIH Wylbur has capture of subpatterns.
The specification of SUBSTRING 2/4 means columns 2-4 of the matched string; note that this is less flexible than captures.
The most important are The macro processor adds commands, constants, functions and expressions to Wylbur.