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by CareyBot

Not so long ago, a well-equipped architect might have had the following items on his drawing board: A T-square or parallel rule; a couple of plastic drafting triangles; some templates for drawing circles, door swings, and the like; and a container bristling with an array of mechanical pencils.A really up-to-the-minute practitioner might even boast an electric erasing machine, to help fix all the errors that inevitably cropped up as hand-drawn plans wound their way to completion.Today, every one of these items is utterly obsolete, right down to the pencils -- all swept away by the advent of computer-aided drafting, or CAD. CAD produces invariably flawless lines, along with perfect lettering in any font or size.As for erasing, it's now done quickly and spotlessly by tapping the Del...