THE FIRST PERSONAL COMPUTER

Can we imagine our selves  without technology? No, in this generation  it is impossible,everything around us bounded with the technological instruction,
Yes, and computer is the main leading device....

On of the most important technological innovations of the twentieth century was the computer. It gradually progressed from an enormous, unwieldy machine to a small personal computer that could be used in offices and at home. A key event in this development was the introduction by the international Business Machine (IBM) company of a new personal computer in 1981.  The computer, named the 5150 was not the first of its breed by any means, but IBM's solid reputation for quality and reliability made it a strong seller and gave the use of  personal computers a powerful boost. they were no longer a trendy fad, but something people increasingly they ought to have.
      IBM had a history in this general field. It created the world first floppy disc in 1967 and in 1975 unveiled its 5100 portable computer, which was probably the first self-contained portable computer system. Around 1980 , the company marketed its Data-master all-in-one desktop word processor. Like the 5100, it was expensive (around $15,000) and sales were low. The 5150 was a different story altogether. It was reasonably affordable at around $3,000 and it offered more memory than its rivals, whose makers promptly began copying it, producing what were initially known as ''IBM clones'' and later simply as PCs. In August 1982, after a year of manufacturing, the two hundred thousandth model was shipped out.
        The first 5150 contained the Intel 8088 CPU, a single floppy disc drive, and 64 KB of RAM and was the brainchild of engineer Don Estridge. The decision to supply the computer with Microsoft's DOS operating system was the foundation for that company's domination of the software market. 

PRINTING FROM MOVABLE TYPE (first printing book)

Hi friends, Me K.R.Ansari(Historical History).

 K.R.Ansari(Historical History).

Now my dear friends before getting let I want to share with you something new which I recently collect from revised history; that is about "First Printing Book"
         
    In 1450 Johann Gutenberg, a craftsman and metalworker from Mainz in Germany, took out a loan from financier. He had been experimenting with ways of printing from movable type, using his knowledge of metalworking to produce a method of casting metal type in quantity by means of a hand mold. He needed funds to develop further tools and equipment,including a wooden screw press, oil based printing links, and paper that could take an impression. With the printing press he created from all these elements he was able to start work on his masterpiece, the Gutenberg Great Bible, the printing of which was completed not later than 1455.
      Gutenberg Bible(also known as the forty-two line Bible, because each page had forty-two lines of text) is commonly held to be the first printed book in Europe and marked the beginning of the mass production of books. It probably took a year to produce the first printing of 180 copies of 1,282 pages each. Gutenberg soon had many imitators, and printing press were set up in city after city to produce Bibles, encyclopedias, theological works, histories, and romances to feed an ever-growing appetite for the printed word.
       The invention of movable type has been likened to the birth of the internet. It was the technological breakthrough that powered the dissemination of ideas during the Renaissance and the humanist explosion of learning of the early sixteenth century. In 1999, Time magazine named the Gutenberg printing press the most important invention of the millennium.

EUREKA! The Archimedes Discovery While Taking a Bath....how to measure density..

HOW TO MEASURE DENSITY

           King Hieron of Sicily, wanting to find out if a crown he had been given was made of solid gold, or whether he had been palmed off with on containing silver, asked Archimedes to solve the problem. But how was he to do so without melting down the metal and destroying the crown? Interestingly while  taking a bath, Archimedes noticed the water level rose when he got in, and he realized that he could determine the gold density of the crown by weighing it in water. He was so excited by this discovery that he reputed to have rushed out naked into the street shouting "EUREKA!"  ("I have found it") .
                 Archimedes was born in 287 b.c.e. in the Greek city-state of Syracuse, Sicily, and is also credited with inventing the lever and the Archimedes screw - a device for lifting water  - and for setting fire to Roman ships using mirror and sun's rays during the siege of Syracuse.  When the city fell in 212 B.C.E., Archimedes, so it was said, was killed by a Roman soldier because he ignored a commend to leave his mathematical diagrams. Archimedes was held in great respect by the ancient world, both as a practical and theoretical  scientist . He wrote on mechanics, hydro-statics, catoptrics (refraction), and mathematics. Although much of his work is lost, his surviving writings were known to Islamic mathematicians in the middle ages. ................ 

MOST POWERFUL BOMB (H-bomb) WIPES OUT ISLAND

MOST POWERFUL BOMB (H-bomb) WIPES OUT ISLAND

           In 1954 The US today exploded the most powerful bomb ever made - and tiny  Bikini Atoll in the south Pacific died. The explosion was the equivalent of 15 million tons of TNT - hundreds of times more powerful than the weapons that destroyed Hiroshima and Nagasaki in 1945. The " Bravo" test of the world's first full-scale hydrogen bomb was a complete success. Cameras were there to record the awesome flash and the immense mushroom cloud - the symbol of our post - war era. But the bomb was apparently even more powerful than expected: the shock went right off the dials of the recording instruments. Though the atoll was cleared of islanders and the seas were patrolled, there are reports that Japanese fisherman on boats more than 70 miles from the blast have been seriously burnt by white ash that fell from the sky. In a smaller test blast two years ago , a complete island vanished.  This puts the US well ahead in the arms race, but it is only a matter of time before the Soviets test their own H-bomb.

IMAGE WAS SENT TO A SMALL SCREEN

FLICKERING THREAT TO SMALL SCREEN

  In 1926 Members of the Royal Institution in London today peered at crude and flickering images of a ventriloquist's doll as electrical engineer and inventor John Logic Bird's unveiled his new ''television''  machine. Baird's home-made equipment successfully transmitted a radio signal from a camera that is partly mechanical and partly electrical. The resulting image was sent electrically to a small screen. Two years ago Baird was able to transmit the outline of shapes, and he has progressed from there. The Scottish inventor's far-fetched idea is that his device could one day provide every home with a substitute for the cinema.