Older issues of Nibble used a checksumming program called Key Perfect
with their listings to verify that a program was keyed in properly.
(They switched to a different scheme called CheckIt at some point,
for which a simple validator was included in every issue. I even
extended CheckIt to generate lists of codes, so I could use the
Applesoft Turbo Editor (also published in Nibble) to enter the
program and then go back and check it in a kind of "batch" mode.) I
never got around to snagging a copy of Key Perfect back in the day,
but now I'm starting to OCR my Nibble collection. Would anybody have
a copy of this program that I could obtain? It'd make the
scanning/OCRing job go much faster.
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