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Chapter 4 Hardware, Software, and Mobile Systems
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MakerBot’s introduction of new composite filaments has 2. Why would Mercedes-Benz want its new driverless cars to talk
the potential to push 3D printing beyond the use of hobbyists, to pedestrians?
inventors, and manufacturers. A reasonably priced 3D printer 3. How could a Nest thermostat save you money?
that can print more than 50 percent of the objects in a typical 4. What advantages would a Nest-compliant washing machine
household could be a valuable home appliance.
have over a traditional one?
Questions 5. Why are 3D printers a potentially disruptive technology to
manufacturing?
1. What would be the benefits of Mercedes-Benz’s new “carriage”- 6. How could new composite filaments affect innovation,
type driverless car over a traditional car that has been converted prototyping, and new product development?
to be driverless?

Source code is compiled into machine code that is processed by a computer. Machine code
is, in general, not understandable by humans and cannot be modified. When a user accesses a
Web site, the machine code version of the program runs on the user’s computer. We do not show
machine code in a figure because it would look like this:
1101001010010111111001110111100100011100000111111011101111100111 . . .
In a closed source project, say, Microsoft Office, the source code is highly protected and only
available to trusted employees and carefully vetted contractors. The source code is protected like
Figure 4-16 gold in a vault. Only those trusted programmers can make changes to a closed source project.
Source Code Sample