Man working at an elaborate electronic desk inside an electronics plant, ca.1940 

Electronics (?) plant with workers, ca.1940 

Women workers in an unidentified electronics office, ca.1950 

Interior view of an unidentified factory,showing workers from behind, ca.1940 

Women workers handling panels of coils in an unidentified electronics office, ca.1950 

Male electronics worker and apparatus, ca.1950 

Interior of an unidentified office that has electronics, ca.1950 

Plumbing and heating equipment inside an unknown plant, ca.1930 

Workers lowering machinery inside the Northrop Corporation's Plant, ca.1950 

Close-up of a man chiseling something inside an unidentified factory, ca.1940 

Worker using a microscope to adjust machinery in an unidentified electrical (electronics?) plant, [s.d.] 

Male worker at the International Electronic Research Corporation, ca.1950 

Exterior of an unidentified chemical plant, ca.1925 

Two men working at a machine inside an unidentified factory, ca.1942 

Two unidentified workers lowering chains in a factory, ca.1930 

Furniture plant with workers, ca.1930 

Unidentified citrus processing plant, ca.1910 

Lines of women workers at the Acme Electronics company, showing a man standing in the foreground, ca.1940 

Unidentified citrus processing plant, ca.1910 

Man at work in what seems to be an electronics-oriented office, ca.1950