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La asistencia a los s es un elemento fundamental para valorar la calidad de una empresa. Ello requiere un conocimiento de las técnicas de comunicación, de las herramientas de software para proporcionar asistencia técnica y del uso de herramientas ofimáticas para mejorar la comunicación.;El libro se estructura en cuatro capítulos. El primero de ellos analiza todos los aspectos involucrados en la comunicación con el y qué herramientas se utilizan para el soporte técnico. Además, se expone el marco jurídico sobre derechos de autor y se analizan las principales licencias de software existentes. El segundo capítulo explica en detalle el funcionamiento del correo electrónico y cómo gestionarlo de forma eficiente haciendo uso de la aplicación Mozilla Thunderbird. El tercer capítulo se centra en el funcionamiento de la firma digital y se facilitan conceptos de criptografía y seguridad en las comunicaciones.;El cuarto y último capítulo explica de manera práctica cómo usar comunicaciones seguras mediante el envío de correos electrónicos cifrados. Además, cada capítulo se complementa con actividades prácticas cuyas soluciones están disponibles en www.paraninfo.es.;Los contenidos se corresponden con los establecidos en la UF0856 Asistencia de s en el uso de aplicaciones ofimáticas y de correo electrónico, incardinada en el MF0222_2 Aplicaciones microinformáticas, perteneciente al certificado de profesionalidad IFCT0209 Sistemas microinformáticos, regulado por el RD 686/2011, de 13 de mayo modificado por el RD 628/2013, de 2 de agosto).;José Luis Berenguel Gómez es doctor en Informática y ejerce su labor docente como profesor de Secundaria impartiendo docencia en ciclos formativos.