Old computer punch card without holes.

Caption: This is a punch card such as was used to enter Fortran programs into the mainframe system at the University of Missouri–Rolla in the late 1970s. The beveled corner on the upper left ensured that all cards were oriented the same way.

Source

I was showing my old college calculus book to my son and found several of these in the pages – we would take stacks of them from the keypunch room to use as note cards and bookmarks. I scanned the picture and claim no rights to it. Kbh3rd

Scanned and uploaded to en: by Kbh3rd.

This object is not a creative work and therefore not subject to copyright.

Eg, opphavsrettshaldaren til dette verket, frigjev dette verket til ålmenta. Dette gjeld over heile verda. I somme landa er dette kan henda ikkje rettsleg mogeleg. I det fall: Eg gjev kven som helst rettane til å nytta dette verket for kva som helst føremål og utan vilkår, minder vilkår er kravde etter lova.