proprietary software

Proprietary software (also called non-free software or closed-source software) is software with restrictions on using, copying and modifying as enforced by the proprietor. Restrictions on use, modification and copying are achieved by either legal or technical means and sometimes both. Technical means include releasing machine-readable binaries to users and withholding the human-readable source code. Legal means can involve software licensing, copyright, and patent law.
See more at Wikipedia.org...

software which users cannot customize to fit their needs.