The earliest, and still the cheapest, barcode scanners

The earliest, and still the cheapest, barcode scanners are built from a fixed light and a single photosensor that is manually "scrubbed" across the barcode.
Barcode scanners can be classified into three categories based on their connection to the computer. The older type is the RS-232 barcode scanner. This type requires special programming for transferring the input data to the application program....
"Keyboard interface scanners" connect to a computer using a PS/2 or AT keyboard–compatible adaptor cable. The barcode's data is sent to the computer as if it had been typed on the keyboard.
Like the keyboard interface scanner, USB scanners are easy to install and do not need custom code for transferring input data to the application program.

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Pride Of Pakistan, Dr. Abdul Salam

Pride Of Pakistan, Dr. Abdul Salam (January 29, 1926– November 21, 1996)

Dr Salam won the Nobel Prize in Physics 1979 for his research in “Grand unification theory”. This theory was inspired by his spiritual beliefs that all forces emanate from a single source.

Salam was a science advisor to the Government of Pakistan from 1960 till 1974, a position from which he played a major and influential role in Pakistan's science infrastructure. Salam was responsible for not only major development and contribution in theoretical and particle physics, but as well as promoting scientific research at maximum level in Pakistan.Salam was the founding director of Space and Upper Atmosphere Research Commission (SUPARCO), and responsible for the establishment of the Theoretical Physics Group (TPG) in Pakistan Atomic Energy Commission (PAEC).As Science Advisor, Salam played an integral role in Pakistan's development on peaceful use of nuclear energy, and directed the research on development of weapons in 1972.
and much much more...

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How to find Gas Leakage in gas Pipeline?

How to find Gas Leakage in gas Pipeline????
Turkey Vultures were (and sometimes still are) used by natural gas companies to pinpoint pipeline leaks. Natural gas is by itself odorless, so gas companies add the chemical ethyl mercaptan to it so that people can smell gas leaks. As it happens, ethyl mercaptan is one of the chemicals emitted by putrefying animal carcasses, and so, strangely, leaks in natural gas pipelines attract congregations of Turkey Vultures.
As gas leakage attract Vultures so company worker can detect gas leakage by following them.

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The Married couple of Jan Davis and Mark Lee

The Married couple of Jan Davis and Mark Lee was the only married couple who flew aboard the Endeavor space shuttle from Sept 12-20, 1992.

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Islands in indonesia

There are 13,667 altogether islands in Indonesia.

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The city of Venice

The city of venice a very beautiful city and stands on about 120 small islands

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