These are licenses that give you the right to use the software for as long as you want. However, if you upgrade a perpetual license, you may be charged for the upgrade. So, while it`s important for your business to stay on top of the latest software releases, perpetual licensing may not be an option. Open source software has very great advantages. However, as we have been involved in many legal cases relating to risk mitigation, intellectual property and data security, we have concerns about software that may or may not have been developed to the highest standards, with a legal entity behind the quality and safety of the product. For many reasons, companies should exercise caution when using public domain software in projects or other important applications: they cannot copy, modify, or redistribute the software. In most cases, software vendors allow the creation of a single copy of the software for disaster recovery purposes. However, copying the software for use on another computer would be considered non-compliant. Open source software does not have a single vendor. It is an accumulation of several developers, which is one of its advantages. However, from a risk mitigation perspective, you need to consider the quality of the work done and who is responsible if your business is harmed in any way by the use of a free multi-source program. There are many types of licensing models, ranging from simple perpetual licenses and floating licenses to more advanced models such as limited licensing.
 The most common licensing models are per individual user (named user, customer, node) or per user at the appropriate volume delivery level, while some manufacturers accumulate existing licenses. These open volume licensing programs are typically referred to as the Open Licensing Program (OLP), Transactional Licensing Program (TLP), Volume Licensing Program (VLP), etc. and contrast with the Contractual Licensing Program (CLP), in which the customer commits to purchase a certain number of licenses over a set period of time (typically two years). Concurrent/floating user licensing also occurs when all users on a network have access to the program, but only a certain number at a time. Another licensing model is the dongle license, which allows the dongle owner to use the program on any computer. Licensing per server, cpu, or points, regardless of the number of users, is a common practice, as are site or enterprise licenses. Sometimes you can choose between a perpetual (permanent) and annual license. Perpetual licenses often require one year of maintenance, but maintenance renewals (subscription renewals) are reduced. There is no renewal for annual licences; After expiration, a new license must be purchased. Licenses can be host/client (or guest), mailbox, IP address, domain, etc., depending on how the program is used. Additional users are licensed, among other things, by extension package (e.B. up to 99 users), which contains the basic package (e.B.
5 users). Some programs are modular, so you need to buy a basic product before you can use other modules.  Be careful, but there are companies you sell, for example Microsoft Office 2013, for $100.00 if the selling price is $459.00. These are not legitimate and legal licenses of the software and BSA may reject these purchases as legal. So be careful when buying software. A rule of thumb is that since in most cases the selling price is set by the software manufacturer, there really isn`t much leeway and it wouldn`t be uncommon to find the software at a higher price. However, if you find it significantly inferior, it should trigger an alarm that the license is not legitimate.. .