Some general fact; everyone should know.

Pratibha Devisingh Patil

Pratibha Devisingh Patil was the first woman President of India. She served as the 12th President of India from July 25, 2007 to July 25, 2012.

Pranab Kumar Mukherjee

A senior leader of the Indian National Congress, Pranab Kumar Mukherjee is currently holding the office of President of India. He was appointed in July 2012 as 13th President of India.

Rajnath Singh

Rajnath Singh is a Minister of Modi's Government. He holds the office of Minister of Home Affair of India since 2014 to till date. He is a Senior leader from the Bhartiya Janta Party.

Major Yuri Gagarin

Yuri Gagarin (1934-1968), A graduate from  Soviet Air Force cadet training school at Chkalov (now Orenburg) and Soviet cosmonaut, and Known as the first human to fly in space.

Gagarin flew into space aboard Vostok 1 on April 12, 1961, and made one orbit of the earth. After that Gagarin became International celebrity, and was awarded with some major titles and medals.

He died in March 1968, when he was piloting MIG-15 training jet crashed.

12 Keys of the computer keyboard, labeled F1, F2, F3,...F12 that are placed along the left side or across the top of a keyboard and are commonly known as function keys. Depending on the installed operating system and computer program it provide different series of shortcut, common instruction or a function that is not otherwise available. Example Alt + F4 closes the program currently active in windows.

5th June is marked as the World Environment day by United Nation Environment Programme (UNEP). We celebrate WED to raise global awareness to take positive environmental action to protect nature and the planet Earth.

A mile is a unit of length most commonly equivalent to 5,280 feet or 1,760 yard s (about 1,609 meter).

A person who brought Industrial revolution in his native Great Britain and the rest of the world with improvement of Newcomen's Steam Engine, James watt. He was a Scottis inventor and mechanical engineer, who worked as mathematical-instrument maker from the age of 19 and soon became interested in improving steam engines. Which were used at the time to pump water from mines.

World war II was began in 1939 and continues till 1945. In the beginning the war was started as an European conflict between Germany and Anglo-French coalition but eventually widened to include most of the nation of the world.

Charles Babbage

Charles Babbage is known as the Father of Computer. He was a British Mathematician and inventor, who designed and build mechanical computing machines. He designed Difference Engine in early 1820. It was computer-like mechanical device with 20-decimal capacity capable of solving mathematical problems.