Many proprietary or open-source software companies sell the copy of the software with a license to use it. There is no transfer of ownership of the thing to the user who does not guarantee lifetime availability of the software, nor is allowed to sell, rent, give to someone, copy or redistribute. Licensing terms may define other legal clauses that users cannot negotiate individually or through a consumer organization and that can clearly accept or reject the product by returning the product to the seller.  This right can be applied effectively if the court provides for a binding deadline for a good reduction immediately after the purchase (as in EU law) or a mandatory public public advertisement of the licence conditions to be made readable by users before the purchase. Two common categories for software according to copyright, and therefore with licenses that confer specific rights to the licensee, are proprietary software and free and open source software (FOSS). The obvious conceptual difference between the two is the granting of rights to modify and reuse a software product purchased by a client: foSS software concedes both rights to the customer and thus collects the modifiable source code with the software («open source»), whereas proprietary software generally does not lay off those rights and therefore hide the source code («closed source»). A software license also contains legally binding definitions for the distribution and use of the software. End user rights such as installation, warranties and commitments are often defined in the software license, including the protection of the developer`s intellectual property. In some software licensing agreements, licensees negotiate acceptance rules with certain corrective measures when the software does not meet or comply with the criteria. Licensees oppose acceptance tests and generally believe that their performance or compliance assurance is all that is necessary. Unauthorized software outside the scope of copyright protection is either public domain (PD) software or undelated, unauthorized software that is treated as internal business secrets.  Contrary to popular belief, unlicensed (non-public) software is fully protected by copyright and is therefore legally unusable (since no right of use is granted by a license) until it is transferred to the public domain at the expiry of the copyright clause.
 For example, these are unauthorized software leaks or software projects placed without a specific license on public software repositories such as GitHub.  Since the voluntary transfer of software to the public (before reaching the copyright clause) is problematic in some jurisdictions (z.B.dem German law), there are also licenses that grant type rights, such as cc0 or WTFPL.  «Software» is Atlassian`s downloadable software (currently referred to as «servers» or «data center» on the market), including mobile applications for these products.