A

A A, or a, is the first letter and the first vowel letter of the Latin alphabet, used in the modern English alphabet, and others worldwide. Its name in English is ''a'' (pronounced ), plural ''aes''.

It is similar in shape to the Ancient Greek letter alpha, from which it derives. The uppercase version consists of the two slanting sides of a triangle, crossed in the middle by a horizontal bar. The lowercase version is often written in one of two forms: the double-storey and single-storey . The latter is commonly used in handwriting and fonts based on it, especially fonts intended to be read by children, and is also found in italic type.

In English, ''a'' is the indefinite article, with the alternative form ''an''. Provided by Wikipedia

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    Contributors: ... l'invasion de réservoirs à l'apparition d'anthropozoonoses. le cas du RAt noir dans l'espace sénégalo-malien...
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    Contributors: ...Laboratoire de Chimie et Physique - Approche Multi-échelle des Milieux Complexes (LCP-A2MC)...
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    Contributors: ... de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives...
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    Contributors: ...Laboratoire de Chimie et Physique - Approche Multi-échelle des Milieux Complexes (LCP-A2MC)...
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    Contributors: ...Université du Québec à Montréal = University of Québec in Montréal (UQAM)...
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    Contributors: ...COSIMA was built by a consortium led by the Max-Planck-Institut für Extraterrestrische Physik...
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    Contributors: ...Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux...
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