Across

1. SKYLAB—American space station launched in 1973 that remained in orbit until 1979. It orbited the Earth every 93 min.

2. NOYCE—The "Mayor of Silicon Valley" (1927–1990) who cofounded the Fairchild Semiconductor Corp. in 1957 and Intel Corp. in 1968.

3. CURTA—Compact hand-cranked mechanical calculator invented by Curt Herzstark (1902–1988). The nonelectric calculator was used to perform addition, subtraction, multiplication, and division.

6. VHF—A band of radio frequencies falling between 30 and 300 MHz.

8. REPEATER—An electronic device that receives and amplifies a weak signal before retransmitting it.

10. SMT—With this method of building electronic circuits, all of the components are mounted directly on the surface of PCBs.

12. MAGNETOMETER—An instrument used to measure the strength and intensity of magnetic forces.

15. LONGITUDE—The angular distance (measured in degrees, minutes, and seconds) on Earth east or west of the Prime Meridian.

16. SAGAN—American astronomer, astrobiologist, and proponent of extraterrestrial life (1934–1996) who wrote The Dragons of Eden, for which he won the 1978 Pulitzer Prize for nonfiction, and the science fiction novel Contact (1985).

17. BENTON—The scientist (1941–2003) and MIT professor who invented white-light rainbow holography. He is also credited with being a pioneer in medical imaging technology and artistic holography.

18. SPECTROMETER—A spectroscope used for measuring wavelengths.

Down

4. UHF—Band of radio frequencies falling between 300 MHz and 3 GHz.

5. HELMHOLTZ—Type of coil used to generate a uniform magnetic field.

7. HOLOGRAPHY—A technique that involves using a photographic plate and a laser to generate 3-D images.

9. CONDUCTION—The transmission of a heat, sound, or electrical current.

13. ARRL—Amateur radio association founded in 1914 by Hiram Percy Maxim.

14. BERLINER—German-American inventor (1851–1929) who received a patent for the disc record gramophone in 1887.