An outdated system (or software) is one that has been developed according to outdated standards or using technologies that are fading into oblivion. Software manufacturers continue to work on newer versions of their products, but after some time, older versions stop being developed, leading to the loss of technical support. Technological progress means that outdated systems can become useless, and integrating them with new solutions will be impossible. Nevertheless, outdated systems are still used in enterprises. During everyday use, it's hard to notice that software is "aging," so it's worth conducting a review (e.g., once a year) of the systems used in the company. When conducting such a review (audit), it's important to pay attention to some important features.