Arvind Narayanan of Stanford, contend that non-public blockchains are simply another name for a shared database 2. Others, like Gideon Greenspan of Multichain see several differences between private blockchain and SQL like databases, from disintermediation to robustness 5.
The default taskbar button text, as well as the text that displays while you press ALT+TAB to modify between home windows, is Microsoft Entry - Students : Database (Entry 2007 - 2016). The ICO has publicly named these firms, in part so that people could entry their data.