Yahoo showed on Monday that it intends to keep fighting Microsoft on multiple fronts, demonstrating an array of improvements in the way it presents search results and other offerings.
The long-time rivals announced an alliance last month designed to keep them within sight of Google, the internet search leader. But that deal is confined to search, and Yahoo's comments made clear the Microsoft tie-up leaves room for antagonism even there.
Much of Yahoo's upgrade resembles innovations in Microsoft's recently revamped Bing search engine.
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