This is the best summary I could come up with:

The European Commission has officially confirmed which tech companies, and which of their services, count as “gatekeepers” under its strict new Digital Markets Act (DMA).

Broadly, the DMA is the EU’s attempt to rein in the market power of Big Tech by opening up entrenched platforms and curbing ecosystem lock-in and anti-competitive behavior, making them compete on the merits of their products and services alone.

Samsung, which appeared on the previous list, successfully argued that it does not meet the threshold for being a gatekeeper with its internet browser.

Likewise Microsoft’s Bing search engine, Edge browser, and advertising service are not on the list, but the Commission says it’s opening market investigations to assess whether they meet the bar for regulation.

The Commission has said these investigation will take no more than five months, but could result in Apple being forced to make iMessage interoperable with competing services upon request.

Meanwhile the likes of Google Search (and Bing, if it ends up being included) will have to give their users a choice of other search engines, while operating system providers will need to offer the ability to uninstall pre-installed apps and change system defaults like virtual assistants and web browsers.

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