Babbage worked and wrote on many ideas of science, engineering and mathematics, but he is most famous for two machines he started and never finished. His Difference Engine would have been a much better calculator than any made before then. His Analytical Engine would have been the first real computer.
Knowing that there were many errors in the calculation of mathematical tables, Babbage wanted to find a way to calculate them mechanically, removing errors made by humans. Three different factors seem to have influenced him: a dislike of untidiness; his experience working on logarithmic tables and differential calculus; and work on calculating machines already done by Wilhelm Schickard, Blaise Pascal, and Gottfried Leibniz. He first talked about the principles of a calculating engine in a letter to Sir Humphrey Davy in 1822.
Babbage's engines were among the first mechanical computers. His engines were not actually completed because he did not have enough money. Babbage realized that a machine could do the work better and more reliably than a human being. Babbage controlled building of some steam-powered machines that more or less did their job; calculations could be mechanized to an extent. Although Babbage's machines were large machines they were organized in a way similar to modern computer architecture. The data and program memory were separated, operation was instruction based, control unit could make conditional jumps and the machine had a separate I/O unit. Ada Lovelace studied how to program them.
Ticket (admission)
A ticket is a piece of printed paper that gives you the right to enter somewhere or do something. Tickets are often used as proof that you have paid for buses, theaters, cinemas or sporting events. Tickets often display printed information like serial number, barcode, price, expiry date, seat number and class of ticket.
Sometimes, you have to take a ticket, such as at the start of a toll road, to help calculate how much you should pay the at end of your journey. Some tickets are becoming electronic barcodes, and are displayed on a screen instead of paper..
Bergamo
Bergamo is a city in northern Italy. Bergamo is in the Lombardy Region, with a population of 117,887 inhabitants.
Brescia
Brescia is a city in northern Italy. Brescia is in the Lombardy Region. It has 192,165 people.
Como
Como is a city in northern Italy. Como is in the Lombardy Region. 83,016 people live there.
Cremona
Cremona is a city in northern Italy. Cremona is in the Lombardy Region with a population of 71,533 inhabitants. It is in the Po Valley on the North side of the Po River.
In the year 218 BCE, Romans founded the city. Before that, it was a village of the Gauls.
Lecco
Lecco is a city in northern Italy. Lecco is in the Lombardy Region with 46,477 inhabitants.
Lodi
Lodi (; Lombard: "Lòd") is a city in northern Italy. Lodi is in the Lombardy Region with a population of 43,488 people (as of 2008). The people who live in Lodi are called Lodigiani. Lodi is famous for a cake called Tortionata.
Lodi was built after the destruction of the ancient roman city of Laus Pompeia during the war with Milan.
The construction of the new city was aided by the German emperor Frederick I Barbarossa.
Mantua
Mantova (or Mantua) is a city in northern Italy. Mantova is in the Lombardy Region. It has a population of 48,103 people. The Etruscans founded the city, Today, Mantua is one of the biggest markets for agricultural products in northern Italy. Vergil was born in a small village near Mantua.
Mantua was named "Capital of the Italian culture 2016".
Pavia
Pavia (; Lombard: "Pavia"; ) is a city in northern Italy. Pavia is in the Lombardy Region with 71.486 people living in it. It is a very old, historical city. It is 30 km south of Milan.
The town of Pavia (then known as Ticinum) was a big city and a special military area for the Romans.
Here, in 476, Odoacer won against Flavius Orestes after a long war. To make the city pay for helping his enemy, Odoacer completely ruined Pavia, but Orestes was able to escape to a city called Piacenza, where Odoacer followed and killed him, and removed from the throne his son Romulus Augustus. This is often thought of as the end of the Western Roman Empire.
A late name of the city in Latin was Papia (probably related to the Pope), which developed to the Italian name Pavia. Sometimes it's called Ticinum Papia, using both Latin names.
After the Lombards conquest, Pavia became the capital of their kingdom. During the Rule of the Dukes, it was ruled by Zaban. It continued to act as the administrative centre of the kingdom, but by the reign of Desiderius, it had fallen to a first-rate defensive work and Charlemagne took it in the Siege of Pavia (June, 774) assuming the kingship of the Lombards. Pavia remained the capital of the Italian Kingdom and the centre of royal coronations until the diminution of imperial authority there in the twelfth century.
In the 12th century Pavia acquired the status of a self-governing commune. In the political division between Guelphs and Ghibellines that characterizes the Italian Middle Ages, Pavia was traditionally Ghibelline, a position that was as much supported by the rivalry with Milan as it was a mark of the defiance of the Emperor that led the Lombard League against the emperor Frederick Barbarossa, who was attempting to reassert long-dormant Imperial influence over Italy.
In the time after that, Pavia was an important and busy town. Under the Treaty of Pavia, Emperor Louis IV gave the Palatinate to his brother during his stay in Italy. Pavia held out against the domination of Milan, finally yielding to the Visconti family, rulers of that city in 1359; under the Visconti Pavia became an intellectual and artistic centre, being the seat from 1361 of the University of Pavia founded around the nucleus of the old school of law, which attracted students from many countries.
The Battle of Pavia (1525) marks a watershed in the city's fortunes, since by that time, the former cleavage between the supporters of the Pope and those of the Holy Roman Emperor had shifted to one between a French party (allied with the Pope) and a party supporting the Emperor and King of Spain Charles V. Thus during the Valois-Habsburg Italian Wars, Pavia was naturally on the Imperial (and Spanish) side. The defeat and capture of king Francis I of France during the battle ushered in a period of Spanish occupation which lasted until 1713. Pavia was then ruled by the Austrians until 1796, when it was occupied by the French army under Napoleon.
In 1815, it again passed under Austrian administration until the Second War of Italian Independence (1859) and the unification of Italy one year later.
Sondrio
Sondrio is a city in northern Italy. Sondrio is in the Lombardy Region with a population of 21,790 inhabitants.
Varese
Varese is a city in northern Italy. Varese is in the Lombardy Region with a population of 96,917 inhabitants.
Perugia
Perugia (said "Pah-ru-zha" ) is the capital city of the region of Umbria in central Italy, near the Tiber River, and the capital of the province of Perugia. The city is about 100 miles (160 kilometres) north of Rome. It covers a high hilltop and part of the valleys around the area.
The history of Perugia goes back to the Roman Empire. However, major parts of the city have been destroyed, and rebuilt, because of many wars, and of earthquakes in the mid-19th century. In recent decades, the city has been known as a university town, with the University of Perugia (about 34,000 students), the University for Foreigners (5,000 students), and some smaller colleges, also. There are annual festivals and events: the Eurochocolate Festival (October), the Umbria Jazz Festival, and the International Journalism Festival (in April).