Love it or loathe it, it’s impossible to dispute the impact Adobe Photoshop has had on the design world. Over the last 25 years it has edited billions of images, and along the way has made itself the byword for image editing.

Photoshop has its critics, especially within the web design industry, who feel that Photoshop doesn’t offer a flexible enough workflow for responsive design. Other designers swear by it, for sheer processing power. The PSD to HTML industry is certainly on the wane, but the PSD format itself is still going strong; with rival applications failing to find traction, Photoshop is likely to be around for some time to come.

To celebrate a quarter of a century of bitmap brilliance the team at ClickInks.com have put together this timeline of Photoshop’s illustrious history. How many of these versions did you use?