Comment by scrumper

Using Photoshop is instructing a computer to perform a series of operations, necessarily fairly high level ones, but conceptually not that different from text-based coding. I agree it stretches the definition pretty thin: where's the control flow? Conditionals?, but are those things really foundational characteristics of programming languages or are they simply the equivalent 'predefined tools' that, say, C gives us?

Excel is much closer to traditional programming: it's basically a purely functional language (absent VBA), but instead of a linear description of the program in a text file, you're in effect embedding functional code inside a virtual machine's memory.

EDIT: I suppose an important question about Photoshop is, can you do computation in it?