Might anyone have the name/source of a good engineering font for symbols -- like diameter (circle with angled line), depth (en-dash sort of line with downward arrow), and counterbalance (like a sideways bracket)?

The client's engineers suggested a font called "AIGDT." It's eluding me. I found a free site that had an engineering font that looked good, but it came with malware, and I cancelled the install. I wouldn't mind buying the font, as long as it's from a legitimate source. I'm on Mac OS X.


2 Answers 2


Get osifont it is designed for this use case and is GPL If its missing something your more than welcome to add it. whats better then this it implements a very big set of language support and follows ISO standard font guidelines.

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I used to work in a technical publishing and for all those elements we used the Mathematical Pi Family via Linotype.com

The Universal Mathematical PI come with 690 technical characters:

math pi

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