35 : Information technology. Office machines

35.220 : Data storage devices

35.220.01

Data storage devices in general

35.220.10

Paper cards and tapes

35.220.20

Magnetic storage devices in general

35.220.21

Magnetic disks

35.220.22

Magnetic tapes

35.220.23

Cassettes and cartridges for magnetic tapes

35.220.30

Optical storage devices

35.220.99

Other data storage devices
Relevance Date (newest first) Date (oldest first) Reference A → Z Reference Z → A
15 30 45 60
BS 3174:1959

BS 3174:1959

Superseded Historical

Alpha-numeric punching codes for data processing cards (nominal size 7? in x 3¼ in)

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15 30 45 60