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, 16.4 percent laptops and 2.1 percent servers.

United States shared a massive part of shipment 38.8 percent (394 million) of the computers, Europe 25 percent and 11.7 percent had gone to Asia-pacific region, the fastest growing market as of 2002. The second billion was expected to be sold by 2008. Almost half of all the households in Western Europe had a personal computer and a computer could be found in 40 percent of homes in United Kingdom, compared with only 13 percent in 1985.

The global personal computer shipments were 264 million units in the year 2007, according to ISuppli Corporation, up 11.2 percent from 239 million in 2006. In year 2004, the global shipments were 183 million units, 11.6 percent increase over 2003. In 2003, 152.6 million computers were shipped at an estimated value of $ 175 billion. In 2002, 136.7 million PC's were shipped, at an estimated value of $ 175 billion. In 2000, 140.2 million personal computers were shipped, at an estimated value of $ 226 billion. Worldwide shipments of PC's surpassed the 100 million mark in 1999, growing to 113.5 millions units from 93.3 million units in 1998.

Future Market :

As of June 2008, the number of PC's in use worldwide hit one billion, while another billion is expected to reach by 2014. Mature markets like the United States, Western Europe and Japan accounted for 58 percent of the worldwide installed PC's. The emerging markets were expected to double their installed PC's by 2013 and to take 70 percent of the second billion PC's. About 180 million computers (16 percent of the existing installed base) were expected to be replaced and 35 million to be dumped into landfill in 2008. The whole installed base grew 12 percent annually.

Increasing number of Personal Computers effect Microsoft Windows systems, the average selling price showed a decline in 2008-2009, possible due to low cost notebooks, drawing $ 569 for desktop computers and $ 689 for laptops at U.S. retail in August 2008. In 2009, average selling price had further fallen to $ 533 for desktops and to $602 for notebooks by January and to $540 and $560 in February. According to research firm NPD, average selling price of all Windows portable PC's has fallen from $659 in October 2008 to $519 in October 2009.

Factors Affecting Demand and Supply of Personal Computers

Price of Personal Computers :

From 8500 B.C. to late 19th century human beings have been inventing different machines with different names to solve their business, mathematics and defense related issues throughout the world. In 1976 Apple took a giant step in the international market producing personal computers and introduced Apple I at the Homebrew Computer Club, California with a price of $ 666.66 followed on with Apple II for $ 1,195 including 16K of RAM. Microsoft sales for 1989 reached by remarkable $ 1 billion by making software programs for micro and network computers leaving other software companies behind.

The demand of Personal Computers and its accessories will gradually increase in future. There are various manufactures are available in the market today who are providing services in desktop computers, Laptops and network servers. Table below is giving an overview different suppliers in the market and their share of market occupation :

The law of demand states that quantity moves in the opposite direc