41. '.JPG' extension refers usually to what kind of file?
42. What does AM mean?
43. In what year was the "@" chosen for its use in e-mail addresses?
44. '.TXT' extension refers usually to what kind of file?
45. What was the first ARPANET message?
46. The NTSC (National Television Standards Committee) is also used in the country of...?
47. "FET" is a type of transistor, Its full name is ________ Effect Transistor?
48. What are three types of lasers?
49. What will a UPS be used for in a building?
50. Who built the world's first binary digit computer: Z1?
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