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Source: Knowledge @ Wharton

In 1985, Adobe Systems had one major product — a printer controller built around Adobe’s PostScript imaging language marketed to printer manufacturers. Now, having completed its acquisition of Macromedia on December 3, 2005, Adobe is the fifth largest software company in the world.

The Photoshop Channels Book
Written by Scott Kelby

One big advantage Photoshop professionals have always had was the understanding of channels. It was their secret weapon, and it enabled them to do things, and work in an entirely different way than their competitors, and maybe that’s why the secret power of Photoshop’s channels has been such a closely guarded secret.
Until now.