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This replica of the first laboratory transistor shows connecting leads and a glass jar for protection; packaging the device was critical to its succes
This replica of the first laboratory transistor shows connecting leads and a glass jar for protection; packaging the device was critical to its success.
A hybrid integrated circuit
A hybrid integrated circuit
Assorted discrete through-hole components
Assorted discrete through-hole components
A silicon wafer; individual devices (VLSI in squares) are not usable until diced, wire-bonded, and packaged
A silicon wafer; individual devices (VLSI in squares) are not usable until diced, wire-bonded, and packaged
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An Italian cameo bracelet representing the days of the week by their eponymous deities (mid-19th century, Walters Art Museum)
An Italian cameo bracelet representing the days of the week by their eponymous deities (mid-19th century, Walters Art Museum)
Circular diagrams showing the division of the day and of the week, from a Carolingian ms. (Clm 14456 fol. 71r) of St. Emmeram Abbey. The week is divid
Circular diagrams showing the division of the day and of the week, from a Carolingian ms. (Clm 14456 fol. 71r) of St. Emmeram Abbey. The week is divided into seven days, and each day into 24 hours, 96 puncta (quarter-hours), 240 minuta (tenths of an hour) and 960 momenta (40th parts of an hour).
Soviet calendar, 1930. Five colors of five-day work week repeat.
Soviet calendar, 1930. Five colors of five-day work week repeat.
Soviet calendar, 1933. Rest day of six-day work week in blue.
Soviet calendar, 1933. Rest day of six-day work week in blue.