I remember using a contraption just like this
My first ‘real’ job was working as a research assistance at the Centre for Resource and Environmental Studies. We had a similar setup for our Tektronix terminals taking snaps of primitive geographic information systems. 
[Thanks Seth]
About Shawn Callahan
Shawn, author of Putting Stories to Work, is one of the world's leading business storytelling consultants. He helps executive teams find and tell the story of their strategy. When he is not working on strategy communication, Shawn is helping leaders find and tell business stories to engage, to influence and to inspire. Shawn works with Global 1000 companies including Shell, IBM, SAP, Bayer, Microsoft & Danone. Connect with Shawn on:
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