SS Archimedes SS Archimedes SS "Archimedes" was a steamship built in Britain in 1839. She is notable for being the world's first steamship to be driven by a screw propeller. "Archimedes" had considerable influence on ship development, encouraging the adoption of screw propulsion by the Royal Navy, in addition to her influence on commercial vessels. She also had a direct influence on the design of another innovative vessel, Isambard Kingdom Brunel's , then the world's largest ship and the first screw-propelled steamship to cross the Atlantic Ocean. The principle of moving water with a screw has been known since the invention of
Acorn Archimedes family omitted either the Acorn or Archimedes part of the name; the first models were named "BBC Archimedes", yet the name "Acorn Archimedes" is commonly used to describe any of Acorn's contemporary designs based on the same architecture. Archimedes machines are no longer sold, but computers such as the Raspberry Pi can still run its operating system, RISC OS (at least later versions), as they use ARM chips that are (mostly) compatible. The Acorn Archimedes was the first RISC-based home computer. The first models were released in June 1987, as the 300 and 400 series. The 400 series included four