ISV stands for independent software vendor(s) which are also known as software publishers. They are organizations that specialize in making and selling software to companies that don’t rely on in-house developed software.
Even though often ISV software is used en-masse by individual third parties, and in some cases even extended and customized, it still remains the property of the vendor.
It is common practice and also expected that ISVs make software products that are able to run on one or more computing hardware and operating system. Leading companies in the computing software and hardware markets, such as Microsoft, often lend support to ISVs as trusted business partners.
Nowadays, ISVs have become the primary group of software producers in the IT industry, often being at the forefront of developing new technologies and solutions.