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personal digital assistant

(Encyclopedia)personal digital assistant (PDA), lightweight, hand-held computer designed for use as a personal organizer with communications capabilities; also called a handheld. A typical PDA has no keyboard, rely...

Limbourg brothers

(Encyclopedia)Limbourg brothers lăNbo͞orˈ [key], fl. 1380–1416, family of Franco-Flemish manuscript illuminators. The Limbourg brothers, Pol, Jan, and Herman, were trained as goldsmiths. They succeeded Jacquem...

Thermidor

(Encyclopedia)Thermidor thûrˈmĭdôr, Fr. tĕrmēdôrˈ [key], 11th month of the French Revolutionary calendar. The coup of 9 Thermidor (July 27, 1794) marked the downfall of Robespierre and the end of the Reign ...

Passover

(Encyclopedia)Passover, in Judaism, one of the most important and elaborate of religious festivals. Its celebration begins on the evening of the 14th of Nisan (first month of the religious calendar, corresponding t...

Maimonides

(Encyclopedia)Maimonides mīˈmən [key], 1135–1204, Jewish scholar, physician, and philosopher, the most influential Jewish thinker of the Middle Ages, b. Córdoba, Spain, d. Cairo. He is sometimes called Rambam...

almanac

(Encyclopedia)almanac, originally, a calendar with notations of astronomical and other data. Almanacs have been known in simple form almost since the invention of writing, for they served to record religious feasts...

Omar Khayyam

(Encyclopedia)Omar Khayyam kīämˈ [key], fl. 11th cent., Persian poet and mathematician, b. Nishapur. He was called Khayyam [tentmaker] probably because of his father's occupation. The details of his life are mos...

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