Image credits

The historic instruments come from Smithsonian Open Access and are in the public domain (CC0); we removed the backgrounds. The photos come from Unsplash and load from images.unsplash.com.

Instruments, Smithsonian Open Access

Portable diptych sundial, 1518
Portable Diptych Sundial Signed L.S.1518 · L. S.
Smithsonian, NMAH · CC0 · record
Vopel compendium, ca. 1540
Vopel Compendiumca. 1540 · Vopel, Caspar
Smithsonian, NMAH · CC0 · record
Bond marine chronometer, ca. 1812
Bond Marine Chronometerca. 1812 · Bond, William C.
Smithsonian, NMAH · CC0 · record
Thomas arithmometer, ca. 1820
Thomas Arithmometerca. 1820 · Thomas, Charles Xavier
Smithsonian, NMAH · CC0 · record
Alexander calculating machine, 1864
Alexander Calculating Machine1864 · Alexander, Joseph B.
Smithsonian, NMAH · CC0 · record
Thacher cylindrical slide rule, 1890s
Keuffel & Esser 1741 Thacher Cylindrical Slide Rule1890s · Stanley, William Ford
Smithsonian, NMAH · CC0 · record
Odhner arithmometer, ca. 1896
Odhner Arithmometerca. 1896 · Odhner, W. T.
Smithsonian, NMAH · CC0 · record
Amsler polar planimeter, ca. 1925
Amsler Type 2 Polar Planimeterca. 1925 · Amsler, Jacob
Smithsonian, NMAH · CC0 · record
Pickett N600-ES slide rule, ca. 1962
Pickett N600-ES Log Log Duplex Slide Ruleca. 1962 · Pickett & Eckel, Incorporated
Smithsonian, NMAH · CC0 · record
Platen printing press, patent model, 1850
Patent Model of a Platen Printing Press1850 · Hawkes, Charles W.
Smithsonian, NMAH · CC0 · record
Francis typewriter, patent model, 1857
Samuel W. Francis Typewriter Patent Model1857 · Francis, Samuel Ward
Smithsonian, NMAH · CC0 · record
Nested cup weights, 1652–1698
Nested Cup Weights1652–1698 · Schirmer, J. P.
Smithsonian, NMAH · CC0 · record
McGill cash register, patent model, 1886
McGill Cash Register Patent Model1886 · McGill, William C.
Smithsonian, NMAH · CC0 · record
Yost typewriter, patent model, 1885
George W. N. Yost Typewriter Patent Model1885 · Yost, George W. N.
Smithsonian, NMAH · CC0 · record
Arithmetic card, ca. 1831
Arithmetic Card for Use with a Numeral Frameca. 1831 · Munroe & Francis
Smithsonian, NMAH · CC0 · record
Ballou adding machine, 1860
Ballou Adding Machine1860 · Ballou, John
Smithsonian, NMAH · CC0 · record
Baldwin calculating engine, 1875
Baldwin Calculating Engine1875 · Baldwin, Frank S.
Smithsonian, NMAH · CC0 · record

Photos, Unsplash

Rooftops of Bern’s old town with the Minster spirePhoto: Pix Tresa on Unsplash
A painter in red overalls rolls yellow paint onto a white wallPhoto: Ali Mkumbwa on Unsplash
A metal watering can on dry soil beside a vegetable bedPhoto: Marine Le Gac on Unsplash
A kitchen scale on a shelf next to cookbooks and jarsPhoto: T on Unsplash
Hand tools on the shelves of a wooden workshop wallPhoto: Ricky Kharawala on Unsplash
A tin of green paint, a roller and a tray on a dust sheetPhoto: Annie Spratt on Unsplash
Cars on a road that climbs through a green mountain valleyPhoto: Baptx on Unsplash
A lit filament bulb in front of a grey wallPhoto: Jack Carter on Unsplash
A calculator, pens and glasses on a white deskPhoto: Cht Gsml on Unsplash
A to-do notebook and glasses next to a laptop on a yellow deskPhoto: Volodymyr Hryshchenko on Unsplash
Hands on a notebook with handwritten word lists, next to a laptopPhoto: Van Tay Media on Unsplash