In the second half of the 18th century, the piano became the most used keyboard instrument, and composers of the Classical Era such as Joseph Haydn, Wolfgang Amadeus Mozart and Ludwig van Beethoven each wrote several piano concertos, and, to a lesser extent, violin concertos, and concertos for other instruments.- Introduction: A Musico-Logical Offering
- Jack Parsons (Wikipedia)
John Whiteside Parsons (born Marvel Whiteside Parsons; October 2, 1914 – June 17, 1952) was an American rocket engineer, chemist, and Thelemite occultist. Associated with the California Institute of Technology (Caltech), Parsons was one of the principal founders of both the Jet Propulsion Laboratory (JPL) and the Aerojet Engineering Corporation. He invented the first rocket engine to use a castable, composite rocket propellant, and pioneered the advancement of both liquid-fuel and solid-fuel rockets.
- Concerto (Wikipedia)
A concerto (/kənˈtʃɛərtoʊ/; plural concertos, or concerti from the Italian plural) is, from the late Baroque era, mostly understood as an instrumental composition, written for one or more soloists accompanied by an orchestra or other ensemble. The typical three-movement structure, a slow movement (e.g., lento or adagio) preceded and followed by fast movements (e.g. presto or allegro), became a standard from the early 18th century.