Some years back, I used to work with some "OLD" (dont mean old people, I mean people that have been in the industry) that used to use Symbols in the History cards, i.e.... Circle, Circle half filled, Triangle, Full triangle, etc etc, there symbols stood for Swapped, Replaced, cleaned and so forth, but it's been a long time and I dont remember them at all, does anyone out there knows what I'm talking about and would be willing to share the wisdom?
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