April 17, 1977: The Apple II debuts at the West Coast Computer Faire, positioning Apple at the forefront of the looming personal computer revolution.

The company’s first mass-market computer, the Apple II boasts an attractively machined case designed by Jerry Manock (who will later design the first Macintosh). It also packs a keyboard, BASIC compatibility and, most importantly, color graphics.

Fueled by some marketing savvy from Steve Jobs, the Apple II launch makes quite a splash at the San Francisco Bay Area’s first personal computer convention.

April 2, 1980: Microsoft releases its first hardware product, the Z80 SoftCard. A microprocessor card that plugs into the Apple II, it allows the computer to run programs designed for the CP/M operating system, a popular OS for business software.

Coming several years before the first version of Windows, the Z80 SoftCard quickly becomes a big hit for Microsoft.

March 1, 1991: Apple introduces the Apple IIe Card, a $199 peripheral that lets users turn Macs into fully functioning Apple IIe computers.

The ability to emulate the popular Apple IIe on a Mac brings Apple’s two operating systems side by side for the first time. While not quite the equivalent of Apple letting you run iOS on a Mac today, it’s not a world away.

February 6, 1985: Frustrated by Apple’s shifting priorities, co-founder Steve Wozniak leaves the company to pursue outside interests.

His departure — which comes the same year that Steve Jobs leaves Apple to form NeXT — represents yet another big change for the company. The move mostly stems from Woz’s dissatisfaction with how management treated the Apple II division. However, his desire to start a new company also plays a role.

January 24, 1984: Apple ships its first Mac, the mighty Macintosh 128K.

Bringing a mouse and graphical user interface to the masses, and heralded by an acclaimed Super Bowl commercial that’s still talked about today, the first-gen Mac will quickly become one of the most important personal computers ever released.

January 2, 1979: Entrepreneurs Dan Bricklin and Bob Frankston incorporate their company Software Arts to publish a little program called VisiCalc.

The first spreadsheet software for the Apple II, the $100 VisiCalc ultimately becomes personal computing’s first “killer app.” It helps transform personal computers from “cool to have” toys into “must have” business accessories.

December 25, 1977: Steve Wozniak spends the holidays building a prototype of the Disk II, the Apple II’s revolutionary floppy disk drive.

“I worked all day, all night, through Christmas and New Year’s trying to get it done,” Wozniak would later recall in his autobiography, iWoz. “[Early Apple employee] Randy Wiggington, who was actually attending Homestead High, the school Steve and I had graduated from, helped me a lot on that project.”

Wiggington takes December 25 off. Woz does not.

August 11, 1950: Apple co-founder Steve Wozniak is born. While Steve Jobs may be the most admired Apple figure, Woz might be the most well-loved by fans.

In addition to his most famous creation, the Apple II, Wozniak is also responsible for imbuing Apple’s products with his fun-loving personality.

Happy birthday, Woz!

June 10, 1977: Apple Computer Inc. ships its first Apple II computer.

A hulking beige mammoth with 4KB of RAM (upgradeable to a whopping 48KB), the Apple II was the computer that defined Apple for a generation of fans. Retailing at $1,298, it cost the equivalent of a handful of MacBook Pros today  — even though it seemed a total bargain at the time.

June 5, 1977: The first Apple II, the personal computer that will put Cupertino on the map, goes on sale.

Previously shown off to a few thousand rabid fans at the West Coast Computer Faire, the Apple II’s arrival means the masses can finally get their hands on the breakthrough machine.  A base unit costs $1,298 — the equivalent of $5,810 in 2021 money.