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A silo in IT is an isolated point in a system where data is kept and segregated from other parts of the architecture. IT professionals often talk about silos in a negative way, because the free flow of data is so important in most enterprise systems.
Many IT experts talk about the limitations and negative impact of information silos. One example is a generic relational database that keeps enterprise information. This information could consist of customer identifiers, purchase histories, product information or any other kind of data assets. When the database is not connected to other parts of the system, it is thought of as a silo. The problem with silos is that the information becomes useless when it is not shared. In the above example, workers on “endpoint” technologies or individual enterprise applications cannot make use of the database holdings, simply because that database is not connected to the architecture as a whole. IT experts often talk about opening up information silos using things like modern cloud services, sophisticated network design and software management tools.