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31: Difference between revisions
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* [[Media:Tek 21 and 31 prelim | * [[Media:Tek 21 and 31 prelim.pdf|Tektronix 21 and 31 Preliminary Manual]] | ||
* [https://w140.com/tek_21_31_calc_interfacing.pdf Tektronix 21 and 31 calculators interfacing information] | * [https://w140.com/tek_21_31_calc_interfacing.pdf Tektronix 21 and 31 calculators interfacing information] | ||
* [[Media:Tek 21 31 calculator interface preliminary.pdf|Tektronix 21 and 31 Preliminary Interfacing Manual]] (needs OCR) | * [[Media:Tek 21 31 calculator interface preliminary.pdf|Tektronix 21 and 31 Preliminary Interfacing Manual]] (needs OCR) | ||