| ACROSS
1. An operating system that is on a disk.
4. Electronic warfare undertaken under direct control of an operational commander to locate sources of radiated electromagnetic energy for the purpose of immediate threat recognition.
7. German organist and contrapuntist (1685-1750).
11. A federal agency established to coordinate programs aimed at reducing pollution and protecting the environment.
12. Aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar.
13. Title for a civil or military leader (especially in Turkey).
14. A logarithmic unit of sound intensity equal to 10 decibels.
15. Primitive predaceous North American fish covered with hard scales and having long jaws with needle-like teeth.
16. An official language of the Republic of South Africa.
17. A fraudulent business scheme.
19. A small cake leavened with yeast.
21. A Mid-Atlantic state.
22. A river in north central Switzerland that runs northeast into the Rhine.
23. A white metallic element that burns with a brilliant light.
25. A software system that facilitates the creation and maintenance and use of an electronic database.
27. (Irish) Mother of the ancient Irish gods.
30. A loose sleeveless outer garment made from aba cloth.
33. A flat wing-shaped process or winglike part of an organism.
36. The elementary stages of any subject (usually plural).
37. The branch of computer science that deal with writing computer programs that can solve problems creatively.
38. A very young child (birth to 1 year) who has not yet begun to walk or talk.
42. One of the most common of the five major classes of immunoglobulins.
46. A silvery ductile metallic element found primarily in bauxite.
47. Any of several small ungulate mammals of Africa and Asia with rodent-like incisors and feet with hooflike toes.
48. A unit of surface area equal to 100 square meters.
49. A river in central Europe that arises in northwestern Czechoslovakia and flows northward through Germany to empty into the North Sea.
51. The compass point midway between northeast and east.
52. Airtight sealed metal container for food or drink or paint etc..
53. Kamarupan languages spoken in northeastern India and western Burma.
54. A rare silvery (usually trivalent) metallic element.
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DOWN
1. United States labor organizer who ran for President as a socialist (1855-1926).
2. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
3. A deep bow.
4. Animal reproductive body consisting of an ovum or embryo together with nutritive and protective envelopes.
5. Someone who works (or provides workers) during a strike.
6. A percussion instrument consisting of a pair of hollow pieces of wood or bone (usually held between the thumb and fingers) that are made to click together (as by Spanish dancers) in rhythm with the dance.
7. A Chadic language spoken south of Lake Chad.
8. Title for a civil or military leader (especially in Turkey).
9. Of or relating to or characteristic of the Republic of Chad or its people or language.
10. Exhibiting or restored to vigorous good health.
18. An independent group of closely related Chadic languages spoken in the area between the Biu-Mandara and East Chadic languages.
20. Having undesirable or negative qualities.
24. A sheet or band of fibrous connective tissue separating or binding together muscles and organs etc.
26. A compartment in front of a motor vehicle where driver sits.
28. A hard malleable ductile silvery metallic element that is resistant to corrosion.
29. A public promotion of some product or service.
31. A soft silvery metallic element of the alkali earth group.
32. A city in western Germany near the Dutch and Belgian borders.
34. Goods (or wreckage) on the sea bed that is attached to a buoy so that it can be recovered.
35. Lower in esteem.
39. A state in midwestern United States.
40. Open-heart surgery in which the rib cage is opened and a section of a blood vessel is grafted from the aorta to the coronary artery to bypass the blocked section of the coronary artery and improve the blood supply to the heart.
41. Evergreen trees and shrubs having oily one-seeded fruits.
43. An enclosed space.
44. A constellation in the southern hemisphere near Telescopium and Norma.
45. (in Scotland or Ireland) A mountain or tall hill.
50. A white soft metallic element that tarnishes readily.
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