A sure sign that a branded product dominates its market is when it becomes a verb -- something that has happened in the tech world to Google's search engine and Adobe's Photoshop image editing application (to the chagrin of both companies' lawyers). Last week Photoshop turned a quarter-century old, amid plenty of online fanfare. Having used pretty much every version since its launch in February 1990, I thought it appropriate to put the 15 major versions of Photoshop down on a timeline, along with some of the various spin-off and companion applications:

Over the years Phot ...

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