On 13 January 1610 Galileo Galilei discovered the fourth satellite of Jupiter, which was later named Callisto. Astronomer especially they didn’t bother coming up with names, they all open the satellites of Jupiter until the middle of the XIX century was named in honor of the Italian Medici family and different sequence numbers (Medici I Medici IV).
Callisto, moon of Jupiter
Callisto in comparison to the earth and the Moon
All four celestial bodies were open to them for a short time in 1610 from 7 to 13 January. In the second half of the nineteenth century they were called galileiani satellites and received individual names: Callisto, IO, Europa and Ganymede. Callisto is the third-biggest satellite in the Solar system, among the satellites of Jupiter, it is second only to Ganymede.
January 13, 1976 inventor Raymond Kurzweil demonstrated the first ever machine to read printed text aloud. The idea of such a device came to him in 1974, but its implementation lacked some devices like CCD, flatbed scanner and speech synthesizer – all of them appeared before the end of 1975.
Raymond Kurzweil, Kurzweil Reading Machine
The original Kurzweil’s idea was to give blind and visually impaired people to read books. The first copy of the Kurzweil Reading Machine was demonstrated to the National Federation of the blind USA (NFB), where the device was met with great enthusiasm. And after six years, the inventor moved on to work with synthesizers music and founded Kurzweil Music Systems. One of the first products, the synthesizer Kurzweil K250 was so good that in blind testing, the musicians were unable to distinguish it from a real piano. And in 1990, Raymond sold the company to Korean musical instrument manufacturer Young Chang.
August 13, 2000 bill gates officially left a post of General Director of Microsoft. In this position he was replaced by Steve Ballmer, which, 14 years later, came the current head Satya Nadella. Gates himself all this time remained the largest shareholder of the company.
Bill Gates
Gates now owns about four percent of the shares of the Corporation, however, he annually sells about 80 million of securities in order to 2018 to completely get rid of this asset. The main occupation of the founder of Microsoft is now charity Foundation Bill and Melinda Gates Foundation.