Friday, 13 November 2020

 

Apple P C 


Steve Jobs and Steve Wozniak first met in mid-1971, when their mutual friend, Bill Fernandez, introduced then 21-year-old Wozniak to 16-year-old Jobs. Their first business partnership began later that year when Wozniak, a self-educated electronics engineer, started to build his original “blue boxes” that enabled one to make long-distance phone calls at no cost. Jobs managed to sell some two hundred blue boxes for $150 each, and split the profit with Wozniak. Jobs later told his biographer that if it hadn't been for Wozniak's blue boxes, "there wouldn't have been an Apple."


In 1975, the two Steves started attending meetings of the Homebrew Computer Club. New microcomputers such as the Altair 8800 and the IMSAI inspired Wozniak to build a microprocessor into his video terminal and have a complete computer. At the time the only microcomputer CPUs generally available were the $179 Intel 8080 (equivalent to $850 in 2019), and the $170 Motorola 6800 (equivalent to $808 in 2019). Wozniak preferred the 6800, but both were out of his price range. So he watched, and learned, and designed computers on paper, waiting for the day he could afford a CPU.


When MOS Technology released its $20 (equivalent to $90 in 2019) 6502 chip in 1976, Wozniak wrote a version of BASIC for it, then began to design a computer for it to run on. The 6502 was designed by the same people who designed the 6800, as many in Silicon Valley left employers to form their own companies. Wozniak's earlier 6800 paper-computer needed only minor changes to run on the new chip.


By March 1, 1976, Wozniak completed the machine and took it to a Homebrew Computer Club meeting to show it off. When Jobs saw Wozniak's computer, which would later become known as the Apple I, he was immediately interested in its commercial potential. Initially, Wozniak intended to share schematics of the machine for free, but Jobs insisted that they should instead build and sell bare printed circuit boards for the computer. Wozniak also originally offered the design to Hewlett-Packard (HP), where he worked at the time, but was denied by the company on five occasions. Jobs eventually convinced Wozniak to go into business together and start a new company of their own. In order to raise the money they needed to produce the first batch of printed circuit boards, Jobs sold his Volkswagen Type 2 minibus for a few hundred dollars, and Wozniak sold his HP-65 programmable calculator for $500.


On April 1, 1976, Apple Computer Company was founded by Steve Jobs, Steve Wozniak, and Ronald Wayne. The company was registered as a California business partnership. Wayne, who worked at Atari as a chief draftsman, agreed to become a co-founder of the company in return for a 10% stake. However, Wayne was somewhat gun-shy due to the failure of his own venture four years earlier. On April 12, less than two weeks after the company's formation, Wayne left Apple, selling his 10% share back to the two Steves for only $800 and leaving them as the active primary co-founders.


According to Wozniak, Jobs proposed the name “Apple Computer” when he had just come back from Robert Friedland’s All-One Farm in Oregon.

Soon after the company was formed, the two Steves made one last trip to the Homebrew Computer Club and demonstrated the finished version of the Apple I. Paul Terrell, who operated a computer store chain named the Byte Shop, was in attendance, and became impressed with the machine. He handed the two Steves his card, and told them to "keep in touch." The following day, Jobs dropped in on Terrell at the Byte Shop store in Mountain View, and tried to sell him the bare circuit boards for the Apple I. Terrell told Jobs that he was interested in purchasing the machine, but only if it came fully assembled, saying he would order 50 assembled computers and pay US$500 each on delivery (equivalent to $2,200 in 2019). Jobs then took the purchase order that he had been given from the Byte Shop to Cramer Electronics, a national electronic parts distributor, and ordered the components he needed to assemble the Apple I. The local credit manager asked Jobs how he was going to pay for the parts and he replied, "I have this purchase order from the Byte Shop chain of computer stores for 50 of my computers and the payment terms are COD. If you give me the parts on net 30-day terms I can build and deliver the computers in that time frame, collect my money from Terrell at the Byte Shop and pay you."

The credit manager called Paul Terrell, who was attending an IEEE computer conference at Asilomar in Pacific Grove and verified the validity of the purchase order. 

Amazed at the tenacity of Jobs, Terrell assured the credit manager if the computers showed up in his stores, Jobs would be paid and would have more than enough money to pay for the parts order. The two Steves and their small crew spent day and night building and testing the computers, and delivered to Terrell on time to pay his suppliers. Terrell was surprised when Jobs delivered him a batch of assembled circuit boards, as he had expected complete computers with a case, monitor and keyboard. Nonetheless, Terrell kept his word and paid the two Steves the money he had promised them.


The Apple I went on sale in July 1976 as an assembled circuit board with a retail price of $666.66. Wozniak later said he had no idea about the relation between the number and the mark of the beast, and that he came up with the price because he liked "repeating digits". Eventually, about 200 units of the Apple I were sold.


Encouraged by the success of the Apple I, Jobs started looking for investments to further expand the business, but banks were reluctant to lend him money; the idea of a computer for ordinary people seemed absurd at the time. In August 1976, Jobs approached his former boss at Atari, Nolan Bushnell, who recommended that he meet with Don Valentine, the founder of Sequoia Capital. Valentine was not interested in funding Apple, but in turn introduced Jobs to Mike Markkula, a millionaire who had worked under him at Fairchild Semiconductor. Markkula, unlike Valentine, saw great potential in the two Steves, and decided to become an angel investor of their company. He invested $92,000 in Apple out of his own property while securing a $250,000 (equivalent to $1,120,000 in 2019) line of credit from Bank of America. In return for his investment, Markkula received a one-third stake in Apple. With the help of Markkula, Apple Computer, Inc. was incorporated on January 3, 1977. The new corporation bought out the old partnership the two Steves formed nine months earlier.


In February 1977, Markkula recruited Michael Scott from National Semiconductor to serve as the first president and CEO of Apple Computer, as Jobs and Wozniak were both insufficiently experienced and he was not interested in taking that position himself. That same month, Wozniak resigned from his job at Hewlett-Packard to work full-time for Apple.


Almost as soon as Apple had started selling its first computers, Wozniak moved on from the Apple I and began designing a greatly improved computer: the Apple II. Wozniak completed a working prototype of the new machine by August 1976. The two Steves presented the Apple II computer to the public at the first West Coast Computer Faire on April 16 and 17, 1977. On the first day of the exhibition, Jobs introduced the Apple II to a Japanese chemist named Toshio Mizushima, who became the first authorized Apple dealer in Japan. In the May 1977 issue of Byte, Wozniak said of the Apple II design, "To me, a personal computer should be small, reliable, convenient to use, and inexpensive."


The Apple II went on sale on June 10, 1977, with a retail price of $1,298. The computer's main internal difference from its predecessor was a completely redesigned TV interface, which held the display in memory. Now not only useful for simple text display, the Apple II included graphics and, eventually, color. During the development of the Apple II, Jobs pressed for a well-designed plastic case and built-in keyboard, with the idea that the machine should be fully packaged and ready to run out of the box. This was almost the case for the Apple I computers, but one still needed to plug various parts together and type in the code to run BASIC. Jobs wanted the Apple II case to be "simple and elegant", and hired an industrial designer named Jerry Manock to produce such a case design. Apple employee  Rod Holt developed the switching power supply.

LCA INDIA

 

LCA-Saagaa

In 1982, Harinarayan was working as the chief designer at HAL’s Nasik division when he was selected by Arunachalam as the Director of DRDO’s Aeronautical Development Agency. At that time, there simply wasn’t enough aeronautical talent in DRDO. 

So, his first step was to bring together the country’s best talent in the field of aerospace engineering. For this purpose, he recruited engineers, scientists and professionals from twenty educational institutions like the IITs and forty Research and Development (R&D) laboratories like HAL and CSIR. In a year, ADA had a team of about 400 engineers and scientists.

Now the team was in place but another problem cropped up — it did not have the right computer for designing. So Rajiv Gandhi, then prime minister, stepped in. During his visit to the United States soon after, he convinced President Ronald Reagan to give the IBM 390 computer for the design work of the Tejas.

ADA next bought CATIA (computer-aided three-dimensional interactive application), the computer-aided design software developed by Dassault, in the early ’90s. However, when ADA started its work, it had a tough time buying electronic components since several embargoes and sanctions had been imposed on India by Western nations in reaction to the Pokhran tests.

This, however, made the team more determined to accomplish their difficult task of designing each element of the design, each raw material for the plane, from scratch.

Since the Tejas was meant to be a light aircraft, the designers had to use carbon composite materials which were still under development.

The next step was to identify companies that could produce the components. Furth India, a small Nagpur company, produced the steel while another small outfit in Kanpur made rubber seals used to close the fuel tank. Gradually, ADA developed all the electrical components that were earlier imported and helped local companies manufacture them. To make production commercially viable, the rights to the intellectual property were handed over to the companies.

For the design, the team chose a compound tail-less delta wing configuration, different from other aircraft of this class. Advanced features like Relaxed Static Stability were added to enhance manoeuvrability. Cutting-edge digital technology was used to design the cockpit’s system, the utility system and the weapon management system. All these core technologies were designed, developed and built in India itself.

The Tejas project also became a cementing force between industry and research institutes. For example, instead of importing the multi-functional display for the cockpit, ADA approached Bharat Electronics to manufacture it. Though BEL was interested, it did not have adequate knowledge about the liquid crystal display (LCD) used in the product.

So ADA asked the Raman Research Institute, one of the pioneers in liquid crystals, to help out.

In January 2001, the small tail-less delta wing prototype was finally completed and ready for testing.  Wing commander Rajiv Kothiyal successfully flew the first flight of the prototype named Technology Demonstrator TD-1.

It was a historic day – Indian skies were seeing an indigenous aircraft after almost 40 years.

From 2001 to 2009, Tejas improved itself gradually in its speed and target accuracy. It went through a lot of changes and updates both in technology and weapon systems. After several tests and multiple prototype vehicles making successful flights, the Tejas received its certification for release to service in 2011, 28 long years after its conception. On January 10, 2011, it was certified and cleared for combat service.

Wednesday, 11 November 2020

Indian Freedom struggle:

1885- Indian National Congress first Meet at Bombay, about 80 leaders from all over India participated. on 28th December 1885.

1886- Second National congress meet at Calcutta. more than 400 leaders participated in this meet. Dadabhayi Navaroji headed this meet.

1888-Forth National congress meets at Allahabad. More than one thousand leaders participated in it.

1907- National congress divided into two wings, a peace-loving group, and revolutionary groups.                                                                                                                                                                                             Savarkar wrote the book on 1857 first Indian freedom struggle.                                                                                                

The British government in India applied the divide and rule policy. 

1909- Lahore congress, in the leadership of  Madan Mohan Malaviya. Gokhale met Mohandas Gandhi in South Africa, who was struggling against the discrimination against Black people by white English people. Gandhiji was arrested and sent to jail in South Africa.

1914-First world war started.

1916- Home rule organized in Madras by Annie Besant. use of desi-goods, education in the local language, and freedom were the aims of this league. In June 1817 Annie Besant was arrested. Gandhiji returned to India and established Sabarmati Ashram in Gujarat. 1917 Raulat Act passed, 1919 Jaliyanwala Bagh killings.

1919-National congress meets in December in Amritsar of Punjab. The non-cooperation movement started. Motilal Nehru presided over the organization. Gandhiji was also present in the meet. khilafat movement started by the Muslim wing of British India.

1920-Non- cooperation movement started in August. Nagpur Congress meet held in December 1920. Gandhiji led the movement. More and more Muslims joined the movement. the government employees resigned, advocates did not go to court and students remained absent from their classes. Foreign clothes were burnt. Nationalism woke-up in Indians. Kashi Vidyapeeth, jamiya Islamiyah, Bihar Vidyapeeth, Gujrat Vidyapeeth, and Tilak Maharastra Vidyapeeth started. functioning.

1922- Chowri Chora episode in which polish station was burnt. Gandhiji called off the non-cooperative movement. Gandhiji was sent to jail. common people and peasants also participated in the national movement. they started wearing hand made khadi dress. It became a people.s movement.

1929-Lahore congress meet declared the agenda of complete freedom to India. 

1930-26th January celebrated as Indian freedom day procession all over the nation. In Lahore, Jawaharlal Nehru was elected president of the procession who was sitting on a horse in the procession.

1930- Namak Satyagraha- Dandi Yatra for 24 days to reach the sea from Ahmadabad started by Gandhiji. on 6th April they reached the sea to make salt.

1931-Motilal Nehru expired in April 1931.

1932-Gandhiji was arrested and sent to Yerawada Jail Pune.

1935- Govt of India Act passed.

1937-Elections held under the India Act 1935.

1938-Subhash Chandra Bose was elected Congress president.

1941-Subhash escaped to Germany.

1942- Quit India resolution passed. civil disobedience movement started across India.

1947-Lard Mountbatten was sworn in as the Last Viceroy of India.

-The Partition plan announced. On 18-7-1947, India's Independence bill passed.

On 15th August 1947, India got Independence. Jawaharlal Nehru became the Prime Minister of India.