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Postcard showing Dr. Martin Luther King, Jr. attending an event at the Highlander Folk School.

Dr. Martin Luther King, Jr., is seen speaking at a wooden pulpit. He has one hand in the air while talking. A microphone on a tall stand is visible in front of the pulpit.

Dr. King spoke at SMU's convocation in McFarlin Auditorium on March 17, 1966. You can hear the speech here: http://smu.edu/newsinfo/audio/mlk-at-smu-17march1966.mp3. The recording was made with a hand-held recorder brought to McFarlin that day by…

Since the 1990s, Texas Instruments has produced multiple graphic calculators. The first, shown here, was the TI-81, which the company first sold in 1990.

By the 1970s, Texas Instruments had become a leader in educational consumer electronics. This assortment of games appears in the late-1970s, and includes the Speak & Spell Compact and Little Professor, a learning aid.

This cell phone, shown in 2004, contained a “Hollywood” chip manufactured by TI. This chip could receive digital television signals.

When Texas Instruments debuted the Speak & Spell in 1978, it brought the first speech synthesis device to the market. In 2002, the development team behind this revolutionary product reunited as shown in this photograph. They are, from left to right,…

Texas Instruments produced the first commercial silicon transistors in 1954. This sketch comes from the notebook of Mort Jones. The arrow points to a small bar cut from a junction silicon crystal grown by TI.

GSI created an array of seismographic equipment. The seismometers shown in this image were created in the 1930s and 1940s. Companies used these models as late as the 1950s.

Although Texas Instruments had entered the field of defense in the 1950s – and would make immense strides in computing in the ensuing decades – it never forgot its roots in geology. This advertisement from 1960s proudly overviews thirty years of…