Source Code for Apple's Lisa Operating System to be Released for Free in 2018

The Apple Lisa, released in 1983, was one of the first personal computers to come equipped with a graphical user interface, and soon the operating system that ran on the Lisa will available for free, courtesy of the Computer History Museum and Apple.


As noted by Gizmodo, Al Kossow, a software curator at the Computer History Museum, recently announced that both the source code for the Lisa operating system and the Lisa apps have been recovered. Apple is reviewing the source code, and once that's done, the museum will be releasing the code publicly.

Just wanted to let everyone know the sources to the OS and applications were recovered, I converted them to Unix end of line conventions and spaces for Pascal tabs after recovering the files using Disk Image Chef, and they are with Apple for review. After that's done, CHM will do an @CHM blog post about the historical significance of the software and the code that is cleared for release by Apple will be made available in 2018.

The only thing I saw that probably won't be able to be released is the American Heritage dictionary for the spell checker in LisaWrite.

Back when the Lisa was first released, Apple charged $9,995, with the machine aimed at business users. It was equipped with a 5MHz Motorola 68000 CPU, 1MB of RAM, and a 5MB hard drive. Given its high price, Apple only managed to sell about 100,000 of the Lisa computers. Though Steve Jobs originally denied it, he later said the Lisa was named for his daughter, Lisa Brennan.

Apple's Lisa operating system featured the text-based Workshop for developing software and the Lisa Office System, which had seven apps that included LisaWrite, LisaCalc, LisaDraw, LisaGraph, LisaProject, LisaList, and LisaTerminal.

The Lisa computer was followed by the Macintosh in 1984, and the Macintosh was essentially a more affordable, improved version of the Lisa, which allowed it to outsell the Lisa. Though Apple did introduce additional versions of the Lisa computer at a lower price tag, it was ultimately discontinued only a few short years after its introduction.

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32 months ago

I wonder why ? what a are the benefits to this ?

“What have museums and History class ever done for us?”

That’s why. Learning from history, being inspired by greatness, extrapolating what’s next.
Score: 26 Votes (Like | Disagree)
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32 months ago

Absolutely cool! Guessing it'll be C with some Assembly thrown in there for critical areas. But this will just be cool to look at for all the programmers out there.

Almost certainly no C. Apple used Pascal as its primary higher-level language back then. The source to QuickDraw and MacPaint were released in 2010. QuickDraw is entirely assembly, and MacPaint is a combination of Pascal and Assembly.
Score: 16 Votes (Like | Disagree)
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32 months ago
$9995 in 1985 is equivalent to over $25k in 2017. So a top-of-the-line iMac Pro ($13k) is still about half of what the Lisa cost back then. For an exponentially more powerful computer. As a business machine, the price is fair.
Score: 14 Votes (Like | Disagree)
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32 months ago

I wonder why ? what a are the benefits to this ?

Per Al Kossow, the Lisa operating system has some historical significance which will be detailed in an upcoming CHM blog post that will accompany the release of the operating system source code.

What we already know is that the Lisa operating system was one of the first graphical user interfaces to a commercial operating system, much of it cribbed by Apple from a quick visit to Xerox PARC. Microsoft Windows quickly followed the Lisa operating system and while Apple claimed that Microsoft had copied the Lisa operating system, in fact Microsoft had also seen the Xerox PARC work themselves.

The Lisa operating system was followed by the Macintosh and its game-changing operating system.
Score: 12 Votes (Like | Disagree)
Avatar
32 months ago

Per Al Kossow, the Lisa operating system has some historical significance which will be detailed in an upcoming CHM blog post that will accompany the release of the operating system source code.

What we already know is that the Lisa operating system was one of the first graphical user interfaces to a commercial operating system, much of it cribbed by Apple from a quick visit to Xerox PARC. Microsoft Windows quickly followed the Lisa operating system and while Apple claimed that Microsoft had copied the Lisa operating system, in fact Microsoft had also seen the Xerox PARC work themselves.

The Lisa operating system was followed by the Macintosh and its game-changing operating system.

It was NOT cribbed, stolen, borrowed or anything other remotely suspect. It was paid for with a s-load of pre-IPO apple stock. Also when the Mac was first introduced the apps had to be written and compiled on the Lisa.
Score: 12 Votes (Like | Disagree)
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32 months ago

I wonder why ? what a are the benefits to this ?

I know a lot of amateur programmers out there who get a kick out of checking out source code. It's like the Apollo 11 files, it's crazy to see how programmers overcome shortcomings or limitations in hardware. It's definitely cool, no matter how practical their uses are in today's world.
Score: 11 Votes (Like | Disagree)

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