Nostalgia for punch cards (fwd)

Subject: Nostalgia for punch cards (fwd)
From: Kevin Austin (
Date: Tue Aug 02 2005 - 22:37:11 EDT

Message: 3
Date: Wed, 03 Aug 2005 06:42:52 +1000
From: Warren Burt <>
Subject: [Acma-l] Pre CMI nostalgia
To: Acma List <>

Greetings acmoids:

This bit of nostalgia is for those old enough to know better, and those
young enough to do the same. (from Chris Mann)



"Remember 80-column punch cards?

"Just think of the concept--the data is made up out of thin air! The
card is just there to organize the holes"

How many cards would it take to encode a 3-minute mp3?


"Assuming a non-Hollerith encoding with eight bits per column, and an
MP3 file encoded at 128kbps CBR, there would be 36,864 cards in that
deck, and the card reader would need a throughput of 205 cards per
second. It might be wise to include an 8-column sequence number,
however, so that a misordered deck can be repaired by a card sorter;
with 72 data columns per card, the total is precisely 40,960 cards (40K
cards), requiring a 228 card/second throughput." The 21 boxes of cards
needed would by 5 feet 9 inches tall.

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