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Rockwell International technicians mount ceramic tiles
UMG22A57_085

Rockwell International technicians mount ceramic t...

Prof. Thad Sheridan Fritz's phonograph festival ca. 1890
UMG22A54_179

Prof. Thad Sheridan Fritz's phonograph festival ca...

Worker using a Macintosh computer
UMG22A39_209

Worker using a Macintosh computer

Data Processing Technician
UMG22A39_064

Data Processing Technician

A Marine holds a small computer
UMG22A39_081

A Marine holds a small computer

Worker using his laptop computer
UMG22A39_208

Worker using his laptop computer

Modern computer disk drive on display
UMG22A39_058

Modern computer disk drive on display

NACA Technician Cleans a Ramjet in 8- by 6-Foot Supersonic Wind Tunnel ca. 1950
UMG22A32_434

NACA Technician Cleans a Ramjet in 8- by 6-Foot Su...

A female U.S. Army audiovisual technician
UMG22A17_287

A female U.S. Army audiovisual technician

Tech High School, [Washington, D.C.] ca. between 1918 and 1928
UMG22A13_164

Tech High School, [Washington, D.C.] ca. between ...

Prof. Thad Sheridan Fritz's phonograph festival ca. 1890
UMG22A06_104

Prof. Thad Sheridan Fritz's phonograph festival ca...

Two female medical technicians
UMG22A03_326

Two female medical technicians

Worker operating a new radio teletypewriter service which allows for instantaneous transmission of written records without the aid of wires, has been perfected by the experts of the Bureau of Air Comm...
UMG21A22_093

Worker operating a new radio teletypewriter servic...

Mount Palomar Observatory
UMG20A12_317

Mount Palomar Observatory