A MACHINE THAT CONTAINS ALL OTHER MACHINES 6
Imagine a person staring at an infinite roll of paper tape. On the paper are symbols in some alphabet or number system. The reader carries out simple, operable instructions on the basis of that data. "Add together the next two digits you are presented with and write down the answer. If the answer is odd, go to step 2. If the answer is even, go to step 3." Now replace the person with a mechanical head that can "read" the instructions, carry out the desired operations, and write the answer down. The British mathematician Alan Turing imagined something like this—a little more complicated, perhaps, but fairly similar. What is it? We have the reading head, the set of instructions, the data on which the instructions are to be performed, the record of the result, and some kind of "state table" that tells the machine where it is in the process. These are the component parts of Turing machines—or as we know them better, computers. More accurately, Turing machines are a method of simulating the operation of computers, a metaphor that enables us to imitate their logical processes. In the words of Wikipedia, "despite their simplicity—[they] can be adapted to simulate the logic of any computer that could possibly be constructed." And to give lawyers fits. But that is getting ahead of ourselves. 7
In Greek mythology, Procrustes had a bed to which he fitted its prospective occupants, whether they liked it or not. The tall were trimmed down. The short stretched on the rack. Intellectual property lawyers have many similarities to Procrustes. The technologies that are brought before them are made to fit the conceptual boxes the law provides, boxes with names such as "copyright" and "patent." Occasionally, new conceptual boxes are made, but—for very good reasons—most of the time we stick with the boxes we have. As with Procrustes, things do not always fit and the process can be distressing for its subjects. 8
It is important to realize that the process of trimming and stretching can be done well or badly. If it is done really badly, the technology is stunted, deformed, even destroyed. If it is done well, the law aids the development of the technology in exactly the happy way described in Chapter 1. What did our Procrustean legal system do with computers and computer science? 9
I will focus on software—the set of instructions the machine is to perform. How should we think of it? Software is written down by programmers. It is recorded first in a form readable to humans, or at least geeks. Then, through a series of transformations, it is turned into the machine code, the ones and zeros that will operate the computer. But at its root it can be understood through the metaphor of the simple list of instructions to be carried out in order, just as with the Turing machine and its infinite tape. 10
How should we fit software into the categories of intellectual property? We have "writing," fixation in some medium of symbols that can be read by others—both machine and human. Writing is normally the domain of copyright. Are computer programs copyrightable? All kinds of problems present themselves. At least in the United States, copyright covers expression. As I pointed out in a previous book, at its base is the conception of the romantic author impressing her uniqueness of spirit on the work at the moment of writing. It is that expressive choice, not the facts or ideas on which the work is based, that copyright covers. And it is only original expression that copyright covers. It does not cover purely functional objects, systems, processes, or methods of operation. One cannot copyright the coat hanger, the mousetrap, or long division. One cannot even copyright a "sculpture" if the main function of its design is to serve as a bicycle rack. Admittedly, one can copyright some expressive works that serve a practical purpose. A book about how to do double-entry bookkeeping is copyrightable. Yet copyright covers only the expressive choices used in selecting the words to explain the method, and the images to represent it, not the methods it describes or the facts or ideas it contains. Can copyright cover computer programs? Should we see them as copyrightable how-to books or as uncopyrightable machines made of words? 11
Machines and other functional innovations are normally the domain of patent rights. One can patent the mousetrap, and then one gets an exclusive right to the actual mechanically enabled method of catching mice, not just the artistic flourishes on the blueprint. Patents have more demanding criteria than copyrights. The invention needs to be novel and have utility, or usefulness; I cannot get a patent over something that would have been an obvious idea to an insider in the relevant field of technology, a "person having ordinary skill in the art," or PHOSITA, in the jargon of patent lawyers. But once I get my patent, it gives me a very strong power to exclude others from the invention—even if they came up with it independently. The right lasts for twenty years. Follow-on innovators who improve on my idea can get a patent on that improvement. They can block me from using the improvement. I can block them from using the original invention. Thus we have an incentive to negotiate if either of us wants to bring the improved innovation to market. 12
So where did software fit? Was it copyrightable writing or patentable invention? There are two issues here. The first is whether there should be any intellectual property rights over software at all. The basic case for that proposition is simple, a classic example of the public goods problem described in the first chapter. Software costs money to create, but is cheap to copy. When a youthful Bill Gates wrote his 1976 letter to the wonderfully named Dr. Dobb's Journal of Computer Calisthenics & Orthodontia, he put the point clearly. 13
Who can afford to do professional work for nothing? What hobbyist can put 3-man years into programming, finding all the bugs, documenting his product and distribute it for free? The fact is, no one besides us has invested a lot of money into hobby software. We have written 6800 BASIC, and are writing 8080 APL and 6800 APL, but there is very little incentive to make this software available to hobbyists. Most directly, the thing you do is theft.4 14
He signed the letter "Bill Gates, General Partner, Micro-Soft." The hyphen would disappear in time. The philosophy stuck around. 15