Free In the Beginning...Was the Command Line by Neal Stephenson

actual program used by Apple’s world-class team of creative engineers, I had high expectations. It arrived on a stack of floppy disks about a foot high, and so there was plenty of time for my excitement to build during the endless installation process. The first time I launched MPW, I was probably expecting some kind of touchy-feely multimedia showcase. Instead it was austere, almost to the point of being intimidating. It was a scrolling window into which you could type simple, unformatted text. The system would then interpret these lines of text as commands and try to execute them.
    It was, in other words, a glass teletype running a command line interface. It came with all sorts of cryptic but powerful commands, which could be invoked by typing their names, and which I learned to use only gradually. It was not until a few years later, when I began messing around with Unix, that I understood that the command line interface embodied in MPW was a re-creation of Unix.
    The first thing that Apple’s hackers had done when they’d gotten the MacOS up and running—probably even before they’d gotten it up and running—was to recreate the Unix interface, so that they would be able to get some useful work done. At the time, I simply couldn’t get my mind around this, but, apparently as far as Apple’s hackers were concerned, the Mac’s vaunted graphical user interface was an impediment, something to be circumvented before the little toaster even came out onto the market.
    Even before my PowerBook crashed and obliterated my big file in July 1995, there had been danger signs. An old college buddy of mine, who starts and runs high-tech companies in Boston, had developed a commercial product using Macintoshes as the front end. Basically the Macs were high-performance graphics terminals, chosen for their sweet user interface, giving users access to a large database of graphical information stored on a network of much more powerful, but less user-friendly, computers. This fellow was the second person who turned me on to Macintoshes, by the way, and through the mid-1980s we had shared the thrill of being hightech cognoscenti, using superior Apple technology in a world of DOS-using knuckleheads. Early versions of my friend’s system had worked well, he told me, but when several machines joined the network, mysterious crashes began to occur; sometimes the whole network would just freeze. It was one of those bugs that could not be reproduced easily. Finally they figured out that these network crashes were triggered whenever a user, scanning the menus for a particular item, held down the mouse button for more than a couple of seconds.
    Fundamentally, the MacOS could only do one thing at a time. Drawing a menu on the screen is one thing. So when a menu was pulled down, the Macintosh was not capable of doing anything else until that indecisive user released the button.
    This is not such a bad thing in a single-user, single-process machine (although it’s a fairly bad thing), but it’s no good in a machine that is on a network, because being on a network implies some kind of continual low-level interaction with other machines. By failing to respond to the network, the Mac caused a network-wide crash.
    In order to work with other computers, and with networks, and with various different types of hardware, an OS must be incomparably more complicated and powerful than either MS-DOS or the original MacOS. The only way of connecting to the Internet that’s worth taking seriously is PPP, the Point-to-Point Protocol, which (never mind the details) makes your computer—temporarily—a full-fledged member of the global Internet, withits own unique address, and various privileges, powers, and responsibilities appertaining thereunto. Technically it means your machine is running the TCP/IP protocol, which, to make a long story short, revolves around sending packets of data back and forth, in no particular order, and at unpredictable times,