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|17=[[Image:Real Estate Master Classic.jpg|thumb|center|A [[Calculated Industries]] [[Real Estate Master Classic]]]] | |17=[[Image:Real Estate Master Classic.jpg|thumb|center|A [[Calculated Industries]] [[Real Estate Master Classic]]]] | ||
|18=[[Image:HP 82240A.jpg|thumb|center|A [[HP 82240A]] infrared thermal printer]] | |18=[[Image:HP 82240A.jpg|thumb|center|A [[HP 82240A]] infrared thermal printer]] | ||
|19=[[Image: | |19=[[Image:HP 41C.jpg|thumb|center|A [[HP 41C]]RPN calculator]] | ||
|20=[[Image:HP48GX.png|thumb|center|A [[HP 48GX]] RPN calculator]] | |20=[[Image:HP48GX.png|thumb|center|A [[HP 48GX]] RPN calculator]] | ||
|21=[[Image:CP400.png|thumb|center|A [[Casio FX-CP400]] graphing calculator]]}} | |21=[[Image:CP400.png|thumb|center|A [[Casio FX-CP400]] graphing calculator]]}} |