The Queen has posted her first message on Instagram at a new Science Museum exhibition in London.
The monarch made history as she touched an iPad screen and shared photos of a letter sent to her great-great-grandfather.
The Queen posted photos of a letter from 19th century inventor and mathematician Charles Babbage to her great-great-grandfather Prince Albert in 1843.
Babbage, known as a pioneer of the computer, wrote to Prince Albert about his Analytical Engine – a machine that could perform calculations using punched cards. It also had a memory unit to store numbers.
View the moment here:
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