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Issue #200 March 2007
Brought to you by: 
Across
1. A software glitch in this lunar explorer caused all of its fuel to
vent in 1994.
4. In this code, common in telecommunications, each bit of data is represented
by at least one voltage level transition.
6. Founded in 1998, this service enables you to send and receive online
payments.
11. Malfunction
12. Object-oriented programming language developed in the 1980s for embedded
real-time applications
13. A two-terminal semiconductor that passes current in one direction
14. Non-return to zero
16. Signals whose range of frequencies are measured from zero to a maximum
bandwidth or the highest signal frequency
18. To drive around in search of a Wi-Fi network
19. Quadrature counts
20. American designer (1918–present) who developed coincident-current
magnetic storage, which was a precursor to RAM.
Down
2. To convert a file into secret code
3. To put into mechanical action
5. &
7. The size of a signal
8. A pressure-sensitive display used to present and receive information
9. A ball in a socket used for pointing and navigation
10. An association charged with defining protocol standards for the short-range
exchange of data over infrared light
15. Sloping; slanting
17. The opposite of digital
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