| 41. | The school maintains a projector room with an slide projector, an overhead projector and a computer system.
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| 42. | Video projectors are digital replacements for earlier types of projectors such as slide projectors and overhead projectors.
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| 43. | Back to the overhead projector, guys ..
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| 44. | An overhead projector will flash the driving scene onto a big screen in front of the car.
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| 45. | To assist with his scouting report on Virginia, this week's opponent, he flicked on an overhead projector.
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| 46. | "It's simply another tool, like overhead projectors.
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| 47. | After switching its focus to overhead projectors in the late 1960s, it was renamed to VEB Polytechnik.
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| 48. | Take the overhead projector ( OHP ).
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| 49. | There was also an overhead projector called a " Dottograph " within walking distance of both players.
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| 50. | Gregory Chudnovsky warned the dozen students in the class, as David changed the slides in the overhead projector.
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