Dinosaur question
Posted by 33Max
on April 6, 2015, 4:33 pm
I have a question about the Pentrace Yellow Board that will positively identify me as the technology dinosaur that I am. I see postings begin with "PSF:". What does "PSF" mean? I have tried finding a definition online but get everything from Point Spread Functions to Pounds per Square Foot to Phoneme Segmentation Fluency. None seem very closely related to fountain pens.
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