Notes and bibliography - Oxford University Press

8: [Late form of 9] vdW 38.
8: [30 made with three hooks] M 167.
9: [Ambiguous and changing size of wedges] K 6-7; M 166-7.
9: [Punchcards] The cards may largely be gone but their name has only
been partially forgotten. A letter from Jerome S. Shipman of Potomac, Md. tells
me that the correct term is "punched cards", and refers me to pg. 12 of the 75th
Anniverary edition of IBM's house journal Think, where the products of its
predecessor company C-T-P are said to have "ranged from commercial scales...
to tabulators and punched cards." A caption on pg. 28 of the same issue
describes, he says, "an advanced machine for high-speed production of punched
cards." These cards may have flicked through their processors with what at the
time was lightning speed, but such a name must not have, its edges becoming
frayed. On IBM's own website you will find reference to a keypunch operator of
their 024 80-column Card Punch recording data "onto 80-column punch cards."
11: [E-Mach, Ninmah] C 221.
12: [Double wedge for 0] M 403; Mc 30; K 6; vdW 39; A 9; H i 29.
12: [Double wedge appears betw. 6th and 3rd c. B. C.] M 167 (6th c.);
M 403 (2nd c.); N2 1113; K 6; N1 27 ("We feel that it did not
exist, say, before 1500: and we find it in full use from the third
century B. C. on.")