Someone got their IBM 029 working

jim stephens james.w.stephens at
Mon Oct 17 16:00:10 CDT 2005

They were good for quick corrections.

If you look in the chart of hollerith codes, at least on IBM, you could
punch out all 12 holes on the card and they could be ignored data.

So if you had a program that could hack it, you could pull out a card,
punch out all the holes over the data, and then put in other data
following the end, or whereever you desired.

It actually was easier for me to use the manual punch for the
few cases I ever corrected a card than it was to use the keypunch,
because you could not see the card as clearly as you can with
the manual one.

Not that you had to have one. Also it was easier, at least to me
to use the 029 to do the correcting than the 129, just because you
had to get the magic number just right on the 129 before you punched
the thing.

also if you were doing a rubout on an 029, it was easier to dupe up
to an error spot, then just rekey the data, obviously, given the proximity
of an 029 and a supply of cards.

On 10/17/05, Vintage Computer Festival <vcf at> wrote:
> On Sat, 15 Oct 2005, Chuck Guzis wrote:
> > Anyone have one of those portable manual punches?
> Yes, I can't imagine how anyone would've used one.
> --
> Sellam Ismail Vintage Computer Festival
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