THE BIGGEST CORPORATE RIVALRIES

1. Coke vs. Pepsi

Why is the battle between Coke and Pepsi -- two ultimately similar types of sugar water -- the most important struggle in the history of capitalism? Simply put, their rivalry transcends time, distance, and culture. It has divided restaurants, presidents, and nations. It has been waged in supermarkets, stadiums, and courtrooms. Its many foot soldiers include Santa Claus, Cindy Crawford, Michael Jackson, Max Headroom, Bill Gates, and Bill Cosby. In 1886 an Atlanta chemist introduced Coca-Cola, a tasty "potion for mental and physical disorders." Pepsi-Cola followed seven years later, though it would be decades (and two bankruptcies) before Coke acknowledged the company in the way it had other competitive threats: lawsuits. Pepsi-Cola had made hay during the Depression. Like Coke, the drink cost a nickel, but it came in a 12-ounce bottle nearly twice the size of Coke's dainty, wasp-waisted one. But by the 1950s, Pepsi was still a distant No. 2. It nabbed Alfred Steele, a former Coke adman, who arrived embittered and ambitious. His motto: "Beat Coke." Coca-Cola refused to call Pepsi by name -- the drink was "the Imitator," "the Enemy," or, generously, "the Competition" -- but it began tinkering with its business (and imitating Pepsi) to stay ahead. In 1979, for the first time in the rivalry's history, Pepsi overtook Coke's sales in supermarkets. It didn't last, and by 1996,Fortune declared that the cola wars had ended. Since then Pepsi, with its increasing focus on health and snacks, has as good as surrendered. America's favorite two soft drinks? Coke and Diet Coke. Winner: Coke

2. Ford vs. GM

Ford, founded in 1903, and GM, which came along nine years later, have been warring for 101 years. The epitome of crosstown rivals -- their headquarters are just 11.5 miles apart -- they face off every day on dealer lots and in motor sports. Both maintain operations to scour the other's new products. In 2011, Ford marketing chief Jim Farley was quoted as having said, "I hate them and what they stand for." Meanwhile, GM chairman and CEO Dan Akerson recommended sprinkling holy water on ailing Ford luxury brand Lincoln. "It's over!" Winner: Draw

3. Thomas Edison vs. Nikola Tesla

In 1884 world-renowned inventor Thomas Edison welcomed a brilliant young Serbian engineer named Nikola Tesla into his New York office. Tesla had been working on direct current (DC) electricity in Edison's Paris division for a few years. Edison's DC apparatus reigned supreme at the time. But Tesla had conceived of a new method using alternating current (AC), which, unlike DC, could transmit significant amounts of power over long distances. According to Tesla, Edison dismissed his ideas as a waste of time, not to mention dangerous given the high voltage involved. Tesla designed several products for Edison, expecting to receive a promised $50,000 bonus for his efforts (about $1 million today). But when Tesla asked for his reward in the spring of 1885, Edison told him it had been a joke all along. Tesla quit. He struck out on his own, securing patents and catching the interest of Pittsburgh industrial titan George Westinghouse. Westinghouse had been quietly developing power stations using AC. Learning of Tesla's technology, he acquired his patents, putting the business might of the Westinghouse corporation behind the inventor. And the war came. When he heard that Westinghouse was moving into the electricity business, Edison ridiculed him. But it wasn't long before Edison was holding shocking public demonstrations to discredit AC power. To make his point, he electrocuted dogs, cows, horses, even an elephant. He then put his name behind an effort to use AC to power the first electric chair. The execution -- which took place in Auburn, N.Y., in August 1890, lasted eight minutes and required two attempts -- was a grisly affair. Westinghouse responded dryly, "They could have done it better with an axe." Ultimately Tesla's AC technology won the war, but the inventors' rivalry morphed into one of the greatest corporate battles in American history. A mega-merger of Edison General Electric and Thomson-Houston in 1892 created GE , which went toe-to-toe with Westinghouse. Long after Edison and Tesla died, their feud carried on until, in the 1980s, GE chose the right CEO (Jack Welch), while Westinghouse chose four successive wrong ones. By the late 1990s, GE was the most valuable company on earth. The original Westinghouse was no more; the current company with that name is less than one-tenth GE's size. Winner: Nikola Tesla 

4. AT&T vs. MCI

MCI didn't seem like a giant killer at first. It was a startup that sold long-distance services via microwave towers to truck drivers. But chairman William McGowan, a hard-living son of a railroad engineer, led his company to do just that. Rather than duck Ma Bell's assaults (predatory pricing), MCI took her head on, filing a case that would lead to the monopoly's breakup -- and an antitrust playbook that others would use against Microsoft decades later. In 1980 a jury awarded MCI $1.8 billion. Two years later the government ruled Ma Bell a monopoly no more. David had slain Goliath. Winner: MCI 

5. Nike vs. Reebok

Blame it on the shoes. The battle between Nike and Reebok lasted over three decades and created celebrity athlete culture as we know it today. Initially the two couldn't have been more different: Phil Knight, a former University of Oregon track star and a Stanford MBA, tossed his accounting career and formed a company to import running shoes to the U.S. He named it Nike after the Greek goddess of victory. Paul Fireman dropped out of Boston University to take over his family's sporting-goods business. He acquired the North American rights to British-made sneakers. Reebok, a line of white-leather women's aerobic shoes named after an antelope, took off as jogging became a national craze. Fireman bought out the parent company in 1984 and took Reebok public the following year. Nike, which had risen to prominence by aggressively courting male customers and fostering a jock-laden management culture, missed the market for women's sneakers. Reebok overtook Nike in 1987 as the latter struggled to catch up. Eventually Nike regained momentum by signing the man who would become the most iconic athlete of all time: Michael Jordan. Nike gained not just a hero athlete but also a telegenic spokesperson who connected with audiences. On the back of Jordan and the massive popularity of his Air Jordan brand, Nike surged ahead. (Air Jordan sales eventually surpassed $1 billion annually.) Reebok responded by signing Shaquille O'Neal, who once showed up to a meeting with Nike wearing a jacket emblazoned with a huge Reebok logo -- much to the dismay of Nike executives. At the 1992 Olympics, Jordan controversially draped a U.S. flag to hide the logo on the Reebok-sponsored tracksuits worn by the U.S.'s winning Dream Team. The move delighted Knight, who baited Reebok further by contributing $25,000 to figure skater Tonya Harding's defense fund after she was accused of orchestrating a vicious attack on Nancy Kerrigan, a Reebok athlete. Nike continued to snap up the most popular athletes, including Andre Agassi, Pete Sampras, and later Tiger Woods, making Reebok seem lame by comparison. In 2005, Adidas bought Reebok, but the new, combined company is still a distant second to the Nike juggernaut.Winner: Nike 

6. Bill Gates vs. Steve Jobs

Bill Gates and Steve jobs were as different as night and day, yet they had much in common. This probably explains the bitterness of their rivalry. The fruits of their enmity? The creation of the personal computer. First, the differences: Gates was an upper-middle-class kid who went to Harvard. Jobs grew up in a family of modest means and didn't attend many classes at Reed College. Deeply technical, Gates wrote the code for Microsoft's early products himself. A born marketer with enough technical chops to be persuasive, Jobs relied on collaborator Steve Wozniak to create the first Apple computer. Gates was the poster child for geeks everywhere. Jobs, meanwhile, was suave from the start. Gates understood scale and leverage; Jobs grasped style and message. (The more charismatic figure, Jobs, will have been played on film by both Noah Wiley and Ashton Kutcher.) Gates and Jobs became the opposing poles of the frantically growing computing revolution. Above all else, though, these rivals understood business. Neither had formal training in the black arts of balance sheets and income statements. Indeed, neither had graduated from college. Yet both were preternaturally shrewd about making a buck -- and how to stick it to the competition. Gates dominated the first two decades of their rivalry, overseeing Windows' rise as the world's default operating system. Eventually Jobs welcomed a $150 million investment from Gates in 1997 when Apple was looking death in the face. (Attendees of the Macworld conference where the deal was announced booed Gates' appearance by video.) But during the last 15 years of his life, Jobs flipped the switch on Gates, dominating beyond-the-PC segments like music players, smartphones, and tablets -- all areas of heavy, and mostly fruitless, investment by Microsoft (Irked by this, perhaps, Gates' wife, Melinda, banned their children from having iPods and iPhones in the house.) The two were known to trade not-so-subtle barbs. Jobs diagnosed Microsoft's essential problem as a lack of taste. Meanwhile, Gates summed up one of Jobs' greatest achievements, the iPad, by saying simply, "It's okay." Born seven months apart (Jobs was older), they were friendly in the years before Jobs died. Having fought each other for so long, they knew better than anyone what the other had accomplished. Winner: Steve Jobs 

7. Venice vs. Genoa

The Italian Maritime republics invented many now familiar features of the business world. It started with tax breaks. Venice and Genoa sat out the feudal era because they didn't have the land needed to produce surpluses -- Venice is in a lagoon, and Genoa is hemmed in by mountains. But they were in the sweet spot for trade. By lending their navies to rulers fending off invaders, they won special privileges to trade without paying tariffs. Around the end of the 12th century, these conditions created an astonishing boom that fueled their feud. To raise the money to assemble ships, crews, and cargo, traders came up with the idea of selling shares in their operations. To spread the risk they invented marine insurance. The demand for ships spurred the development, at the Venice Arsenale, of the largest factory complex in Europe before the Industrial Revolution. Builders there mass-produced vessels using standardized parts on an assembly line -- it was said that they could build a galley in a single day. (Dante even gave it a cameo in his Inferno.) Eventually, to maintain clear records, there arose a sublime invention: double-entry bookkeeping. Goethe may have been into the schnapps when he (reputedly) said that "double-entry bookkeeping is one of the most beautiful discoveries of the human spirit," but you can see what he was driving at. Without the concepts of credito and debitoand the balance sheet, modern capitalism wouldn't be possible. Winner: Venice

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8. HP vs. IBM

Hewlett-Packards' victory over IBM has not been particularly sweet. In 2006 it surpassed IBM in revenues, a lead it has maintained. But revenues are not the only measure of success. Since the earliest days of IT, they have been polar opposites: HP seeded the engineering-heavy ethos of contemporary Silicon Valley. IBM's iconic Thomas Watson was more salesman than scientist. HP has had more CEOs in a decade than IBM  has had since the end of the Watson family reign. IBM draws from five-year plans, while HP is fond of aggressive moves. Winner: IBM

9. Airbus vs. Boeing

It's about more than airplanes. The $160 billion aviation industry is pivotal to national economies and thousands of jobs, not to mention civic pride. Boeing once dominated, but Airbus, a subsidiary of Franco-German defense giant EADS, edged out a lead in 2003. Political tensions have run hot since. Trade officials on both continents are fond of scathing op-eds and public statements alleging malfeasance. Both sides have a point. A 2011 leak revealed a personal letter from President George W. Bush to Saudi Arabia's King Abdullah urging the purchase of Boeing jets. And Airbus has received billions in subsidies. As Boeing deals with 787 Dreamliner delays, Airbus has taken to depicting its planes with a Pinocchio nose. Ouch. Winner: Draw 

10. Union Pacific vs. Central Pacific

Abraham Lincoln kicked off the race in 1862. The Union Pacific Railroad started building westward from Omaha while the Central Pacific Railroad built eastward from Sacramento. They would meet in Utah, each receiving land and U.S. bonds per mile of track built. Bad blood spilled all the way down to the workers, exacerbated by racial tension. Pacific used Chinese immigrant labor; Union was staffed by Irishmen. Many died from the breakneck pace required to beat the other. (TNT explosions didn't help things much.) In 1869 trains from both companies touched noses, and then one passed the other to continue across the country. The race ended, their feud dissolved. Winner: Draw