business software is likely to be developed to meet the needs of a specific business, and therefore is not easily transferable to a different business environment, unless its nature and operation is identical. Due to the unique requirements of each business, off-the-shelf software in unlikely to completely address a company's needs. However, where an on-the-shelf solution is necessary, due to time or monetary considerations, some level of customization is likely to be required. Exceptions do exist, depending on the business in question, and thorough research is always required before committing to bespoke or off-the-shelf solutions. Some business applications are interactive, i.e., they have a graphical user interface or user interface and users can query/modify/input data and view results instantaneously. They can also run reports instantaneously. Some business applications run in batch mode: they are set up to run based on a predetermined event/time and a business user does not need to initiate them or monitor them. Some business applications are built in-house and some are bought from vendors (off the shelf software products). These business applications are installed on either desktops or big servers.