For example, a mainframe environment is optimal for a hospital running numerous transactions on one database. In this case, the systems administrator develops applications that take full advantage of the mainframe's power, and most input devices are terminals. Mainframe users' business is completely automated and they have no need for Microsoft PowerPoint or Microsoft Word. Yearly support of a mainframe environment is minimal. For example, if users are developing PowerPoint presentations, you can set up PowerPoint on their machines.
Users can then save their presentations on the server, using it as a file server.
This setup works fine and is easy to maintain. IBM is selling more mainframes than ever. For example, I created UDF.txt, which Listing 1 shows. First, UDF.txt defines the unique IDs and unattended.txt sections that it will provide replacement data for. Next, UDF.txt provides the replacement data.