Britain's Queen Elizabeth II on Thursday shared the first post signed by her on Instagram during a visit to London's Science Museum.
The queen shared on the Royal Family's account a letter sent by 19th-century mathematician and computer pioneer Charles Babbage to her great-great-grandfather Prince Albert, Queen Victoria's husband.
"Today, as I visit the Science Museum, I was interested to discover a letter from the Royal Archives, written in 1843 to my great-great-grandfather Prince Albert," Queen Elizabeth wrote in the post's caption.
In the letter, Babbage told Queen Victoria and Prince Albert about his invention of the 'Analytical Engine', based on which the first computer programmes were created by Ada Lovelace, a daughter of Lord Byron.
"Today, I had the pleasure of learning about children's computer coding initiatives and it seems fitting to me that I publish this Instagram post, at the Science Museum which has long championed technology, innovation and inspired the next generation of inventors," she added.
She signed the post "Elizabeth R."