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2. HP-65 - Wikipedia

   en.wikipedia.org/wiki/HP-65

   HP-65. The HP-65 is the first magnetic card-programmable handheld calculator. Introduced by Hewlett-Packard in 1974 at an MSRP of $795 [ 1] (equivalent to $4,912 in 2023) [ 2], it featured nine storage registers and room for 100 keystroke instructions. It also included a magnetic card reader/writer to save and load programs.

3. ISO/IEC 7810 - Wikipedia

   en.wikipedia.org/wiki/ISO/IEC_7810

   ISO / IEC 7810 sizes. Most banking cards and ID cards. Size may also be referred to as CR-80 or TD1 . Older-style ID cards. Visas. All card sizes have a thickness of 760 ± 80 μm, i.e. minimum 0.68 millimetres (0.027 in) and maximum 0.84 millimetres (0.033 in). The standard defines both metric and imperial measurements, noting that: [ 4]

4. Permeability (electromagnetism) - Wikipedia

   en.wikipedia.org/wiki/Permeability...

   Scientists. v. t. e. In electromagnetism, permeability is the measure of magnetization produced in a material in response to an applied magnetic field. Permeability is typically represented by the (italicized) Greek letter μ. It is the ratio of the magnetic induction to the magnetizing field as a function of the field in a material.

5. Card stock - Wikipedia

   en.wikipedia.org/wiki/Card_stock

   An Oscar Friedheim card cutting and scoring machine from 1889. Card stock, also called cover stock and pasteboard, is paper that is thicker and more durable than normal writing and printing paper, but thinner and more flexible than other forms of paperboard . Card stock is often used for business cards, postcards, playing cards, catalogue ...

6. The Tasteful Thickness Of Your Free Google Profile Business Card

   techcrunch.com/2009/05/01/the-tasteful-thickness...

   Well, aside from now including them in Google Search results, and giving you the option to have a vanity URL, Google is now giving away 10,000 sets of business cards to people that have one.

7. TI-59 / TI-58 - Wikipedia

   en.wikipedia.org/wiki/TI-59_/_TI-58

   TI-59 / TI-58. A TI-59 showing a magnetic storage card being inserted into the card reader in the side. The TI-59 is an early programmable calculator, that was manufactured by Texas Instruments from 1977. It is the successor to the TI SR-52, quadrupling the number of "program steps" of storage, and adding "ROM Program Modules" (an insertable ...