4 ms·
Thinking about 2D barcodes as pulse trains, rather than pixels, made them make a lot more sense to me. Aside: It's not a Marsh anymore, but I drive by the supe
by EvanAnderson 2y ago
Thinking about 2D barcodes as pulse trains, rather than pixels, made them make a lot more sense to me.
Aside: It's not a Marsh anymore, but I drive by the supermarket where the first UPC was scanned in a retail sale a couple times a week.