This is one example of many castles in the medieval time period. There were many parts to a castle. But, it depended on how the castle was built to recognize parts that did and did not appear on the castle built.
Like spray paint, these markers give off volatile organic compounds. Some of the most recently made permanent markers are made from recycled plastic.[citation needed] The permanent marker was invented in 1952 by Sidney Rosenthal.
The answer to this question depends on your definition of a computer. The earliest computers were mechanical devices used to help people count. The first known counting devices or tools were Tally Sticks from about 35,000 BCE. The abacus was invented, possibly by the Babylonians or the Chinese in about 2400 BCE.