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Breve historia de la comunicación audiovisual.

 Resultado de imagen para dibujos en piedras antiguos
Desde siempre el hombre ha tenido la necesidad de comunicarse con sus familiares. En la antigüedad dibujaban y escribían los acontecimientos en piedras y paredes de cuevas, con el tiempo tuvieron que que inventar nuevos métodos para comunicarse, como el papel, el rotafilio, el proyector de diapositivas y el pizarrón.

 En todas partes las exposiciones de temas y proyectos se llevaban a cabo mediante dibujos y textos, que al momento de la ponencia se realizaban en las hojas grandes de papel de un rotafolio.
Imagen relacionadaLas presentaciones antes se hacían con diapositivas(es decir, transparencias fotográficas de 35mm), las cuales se proyectaban en una pantalla, con el salón en total oscuridad, desde reproductores automáticos en forma de carrusel.También se utilizó el retroproyector de transparencias de acetato. esto resultaba muy costoso y su producción era muy complicada. 


Imagen relacionada
El gran salto, como el de los procesadores de textos,se dan con la aparición de las computadores y de programas capaces de manipular texto e imágenes en módulos o páginas llamadas diapositivas, que se proyectan (slide show) una a una con la finalidad de comunicar información. El primer pograma comercial de presentaciones electrónicas, en el que se creaban presentaciones en una interfaz tipo WYSIWYG  que significa What You See Is What You Get, fue BRUNO, que se escribió-en 1979- originalmente para la computadora HP-1000  

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