Friden EC-130 Instruction ManualThis document is the original version of the general instruction manual for the Friden EC-130 electronic calculator. The second version of this manual differed only slightly from this version, with the main difference being updates in Version 2 to reflect Singer's purchase of Friden.
Friden 130 Instruction Manual
Document Scan Courtesy of Mr. Al Kossow, Computer History Museum
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