23 Apr
2020
23 Apr
'20
12:19 p.m.
Aperture cards (piece of 35mm micro-film mounted in card)
(As opposed to Emmanuel Goldberg's "Rapid Selector", or Vannevar Bush's
"Memex")
Round hole Univac/Remington-Rand 90 column
There was folklore that IBM had PATENTED their rectangular hole shape, and
the use of a wire brush and brass roller reader
Optical mark cards
IBM System/3 96 columns undersized cards
"Marginal" knitting needle cards(Royal McBee, EZ sort, Zato-code,
keysort,...); some even used two depths of notch
It was right about the time of LBJ's re-election that IBM started to round
the corners on cards
On Thu, 23 Apr 2020, Mike Stein via cctech wrote:
How about 96 column and EPC (Edge Punched) Cards?