Went for 1990s but don't know if this is right. Had to pick something. Directly from wikipedia: * 1994 - Peter Shor devises an algorithm which lets quantum computers determine the factorization of large integers quickly. This is the first interesting problem for which quantum computers promise a significant speed-up, and it therefore generates a lot of interest in quantum computers. So looks like 1990's is correct.
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The first airplane was introduced about 1897.
Encryption
it was introduced in 1923
Cattle were first introduced with the First Fleet in January 1788.
The first camcorder was introduced around 1982 by JVC.
He is introduced in the first page of Stave one.
The factory act was first introduced in 1833.
RSA
It was first introduced in 1987
The world's first escalator was introduced on Coney Island