Touting the Silent Operation of the Machine
Friden News Magazine, June, 1967
This advertisement speaks to the "silent" operation of the Friden 130 as compared to electromechanical calculators, which were notorious for being quite noisy when operating. Along with the quiet operation of the calculator, the advertisement notes the speed of the calculator as compared to its electromechanical predecessors.
By the time this advertisement was in print, a number of competing electronic calculator manufacturers had come to market with electronic calculators that were smaller, actually quieter (the mechanical keyboard action on the Friden 130 calculator made a little bit of noise), and faster, not to mention, less-expensive than Friden's 130 and 132 calculators.