February 24, 2015 1:00 PM EST
A pple CEO Tim Cook took a moment on Twitter to remember his mentor and friend Steve Jobs on Tuesday, the day on which the late Apple co-founder would have turned 60.
“The only way to do great work is to love what you do,” Cook wrote, quoting a line from Jobs’s 2005 commencement address at Stanford University.
Jobs died of pancreatic cancer in October 2011. He had handed over the reins of the company he founded to Cook, who previously served as Apple’s chief operating officer, in August of that year. Under Cook’s leadership, the value of Apple has more than doubled, now reaching more than $750 billion.
Read next: Siri Took All Those Language Classes You’ve Been Putting Off
See Steve Jobs’ Legacy in 16 Photos 1976
Apple I was Apple's first computer, which became obsolete within a year. Today, they are auctioned off as collector's items.Justin Sullivan—Getty Images 1977 Apple II was the follow up to the Apple I computer. Apple II proved highly successful and spawned several variations.Ralph Morse—The LIFE Images Collection/Getty Images 1983 Lisa was Apple's office computer that was the first personal computer to use a graphical user interface. It was a commercial flop, largely because it retailed for a whopping $10,000. Ted Thai—The LIFE Picture Collection/Getty Images 1991 NeXT Station was a workstation computer manufactured by NeXT, a computer company Steve Jobs founded in 1985 after he was forced out of Apple. After Apple acquired NeXT in 1996, Jobs rejoined Apple. Kristy MacDonald—dapd/AP 1995 Pixar's Toy Story was the film studio's first feature film in 1995. Pixar had spun out from a larger graphics corporation in 1986 with funding from Steve Jobs. Alan Dejecacion—Getty Images 1998 The iMac was originally released in 1998, and it was the first Mac computer to have a USB drive but no floppy disk. Many media outlets heralded it as a game changer. Over two million were sold in two years. John G. Mabanglo—AFP/Getty Images 1999 The iBook was a line of laptop computers designed for use in schools. The computer, called the "iMac to go," was a huge hit with several upgrades over the years. Ted Thai—The LIFE Picture Collection/Getty Images 1999 The Power Mac G3 was a personal computer in the Power Macintosh line. Its upgraded hardware meant it was faster than most other computers on the market. Alan Dejecacion—Getty Images 2001 Apple opened its first Apple Stores in 2001, with the original two stores in Virginia and California. On the opening day, thousands of Apple fans stood in line and collectively spent over half a million dollars. Justin Sullivan—Getty Images 2003 The iTunes Store is Apple's online digital media store that redefined the music purchase experience and became a runaway success within years. By 2008, it had become the largest music vendor in the U.S. Ian Waldie—Getty Images 2001 The iPod followed the release of iTunes and other consumer-facing software. It offered data storage and a sleek design, and soon became the nation's go-to portable music player. Gabe Palacio—Getty Images 2006 Macbook Pro was Apple's first computer to use Intel Core processors, replacing PowerBook computers. The Macbook Pro line is Apple's latest laptop collection. Justin Sullivan—Getty Images 2005 The Mac Mini was Apple's first consumer-targeted computer to ship without a display, keyboard or mouse, intended to minimize the space taken by a desktop computer.Justin Sullivan—Getty Images 2007 The first iPhone was released after years of speculation that Apple would produce a smartphone. It was known for its large touch screen and finger-touch method, as opposed to using a stylus. It was marketed under the slogan "This is only the beginning." Tony Avelar—AFP/Getty Images 2008 The App Store is Apple's online marketplace for downloading and developing apps. It was released alongside its iPhone 3G, and both proved to be massive successes. The App Store logged over 10 million downloads on the first weekend.Justin Sullivan—Getty Images 2010 The iPad is an Apple tablet computer that met mixed reviews, as users were not sure if it was intended to replace or supplement laptop use, though many praised its ability to connect to WiFi or 3G. That year, the iPad became the leader in the tablet computer market. Justin Sullivan—Getty Images Listen to the most important stories of the day.
More Must-Reads from TIME Where Trump 2.0 Will Differ From 1.0 How Elon Musk Became a Kingmaker The Power—And Limits—of Peer Support The 100 Must-Read Books of 2024 Column: If Optimism Feels Ridiculous Now, Try Hope The Future of Climate Action Is Trade Policy FX’s Say Nothing Is the Must-Watch Political Thriller of 2024 Merle Bombardieri Is Helping People Make the Baby Decision