Two days ago marked the 25th anniversary of Steve Jobs unveiling the Aqua interface for Mac OS X at Macworld Expo.James Thomson, the main engineer working on the original dock, shared a personal retrospective on its development.The version showcased at the event was different from the final product, with square boxes around icons and a 'Dock' folder in the user's home folder.James Thomson's story includes new details and additional links for further reading.