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Issue #203 June 2007
Across
2. NOAA—U.S. agency that studies oceans and the atmosphere
4. CHECKSUM—Binary digits attached to the end of a block of data. The
value of the attached digits is taken from the sum of the data in the
block.
8. TRAJECTORY—The path in space followed by a body
9. ASCII—Code based on the English alphabet that represents text
14. ITERATION—A repeated process in a computer program
17. RASTERIZE—Convert into a digital image that represents a rectangular
grid of pixels
18. CHIPSET—The name given to two or more integrated circuits that work
together
19. TRANSFORMER—A device that transfers energy from one electric circuit
to another without requiring motion between its parts
20. GATEWAY—A network node that links two networks, which use different
protocols, and allows them to share information.
21. FLOP—This (an acronym) is used to measure a computer’s performance, especially
in floating-point calculations.
Down
1. INDUCTOR—A passive electrical device used in currents for its ability
to make a magnetic field form around a current-carrying conductor
3. SIDEREAL—Relating to stars, constellations, or their positions in the
sky
5. MAXWELL—The Scottish mathematician (1831–1879) who contributed to modern
physics by creating four equations that express the relationship between
electrical and magnetic fields. He also deduced that light is electromagnetic
in nature.
6. TRAP—A code or signal triggered by a processor’s internal hardware
that is designed to capture errors and reveal their locations
7. HOUSTON—Home of NASA’s Johnson Space Center
10. IONOSPHERE—The part of the upper atmosphere that has charged particles
11. IMPEDANCE—The ratio of voltage to electric current
12. DATABASE—A collection of information stored in a computer so a program
can quickly consult it
13. THERMISTOR—A resistor used to measure temperature changes
15. PROTOTYPE—The first physical version of a new chip or board
16. UPGRADE—A newer version of firmware
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