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Another Arabic word sometimes used for Christians, particularly in a political context, is Salibi ( "Crusader") from salib ( "cross") which refers to Crusaders and has negative connotations. However, Salibi is a modern term; historically, Muslim writers described European Christian Crusaders as al-Faranj or Alfranj () and Firinjiyah () in Arabic" This word comes from the Franks and can be seen in the Arab history text Al-Kamil fi al-Tarikh by Ali ibn al-Athir.

What is the Arabic term when referring to Christians in a political sense?
Answer: Salibi
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Machine vision systems often require bright and homogeneous illumination, so features of interest are easier to process. LEDs are often used for this purpose, and this is likely to remain one of their major uses until the price drops low enough to make signaling and illumination uses more widespread. Barcode scanners are the most common example of machine vision, and many low cost products use red LEDs instead of lasers. Optical computer mice are an example of LEDs in machine vision, as it is used to provide an even light source on the surface for the miniature camera within the mouse. LEDs constitute a nearly ideal light source for machine vision systems for several reasons:

LEDs are often used for what type of systems?
Answer: Machine vision
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Richmond is located at the fall line of the James River, 44 miles (71 km) west of Williamsburg, 66 miles (106 km) east of Charlottesville, and 98 miles (158 km) south of Washington, D.C. Surrounded by Henrico and Chesterfield counties, the city is located at the intersections of Interstate 95 and Interstate 64, and encircled by Interstate 295 and Virginia State Route 288. Major suburbs include Midlothian to the southwest, Glen Allen to the north and west, Short Pump to the west and Mechanicsville to the northeast.

Richmond is located at what line of the James river?
Answer:
the fall line