If only those were monopolies.

15 years ago Microsoft had a monopoly on the x86 operating system market and used that position to unfairly take browser market share by bundling IE with Windows. They had agreements with almost all PC manufacturers to ensure Windows was installed on each PC sold.

> The plaintiffs alleged that Microsoft abused monopoly power on Intel-based personal computers in its handling of operating system and web browser sales. The issue central to the case was whether Microsoft was allowed to bundle its flagship Internet Explorer (IE) web browser software with its Microsoft Windows operating system. Bundling them together is alleged to have been responsible for Microsoft's victory in the browser wars as every Windows user had a copy of Internet Explorer. It was further alleged that this restricted the market for competing web browsers (such as Netscape Navigator or Opera) that were slow to download over a modem or had to be purchased at a store.

https://en.wikipedia.org/wiki/United_States_v._Microsoft_Cor....

No true monopoly?

Well, yes. In the sense that I use search engines other than Google, and I know others who do the same. And I know many people who use operating systems other than Windows.

I get what you mean, but at the same time, a monopoly these are not. Just because there are companies that have a very large market share does not mean there are no alternatives.