Sistemas de arquivos

http://www.google.pt/url?sa=t&source=web&ct=res&cd=1&ved=0CAsQFjAA&url=http%3A%2F%2Fjoaquim_ribeiro.web.simplesnet.pt%2FArquivo%2FClassificacao.htm&rct=j&q=Arquivos%3A+sistemas+de+classifica%C3%A7%C3%A3o&ei=YtKbS7vtCcOC4Qa__N1_&usg=AFQjCNGJ8tZfy4QIqipkAAA45IdOXBIX8Q

Modelos de cartas comerciais

http://www.google.pt/url?sa=t&source=web&ct=res&cd=5&ved=0CBsQFjAE&url=http%3A%2F%2Fwww.est.ualg.pt%2FADEe%2Fdisciplinas%2Fcet%2Ftc%2Fmaterial%2Fmodelos_de_cartas_2006.pdf&rct=j&q=modelos+de+cartas+comerciais&ei=eO6XS8PNPJaJ4gb-tuHcCg&usg=AFQjCNGbxBVYM3LaIJWVGYKT9i0oOZhGBw
http://www.estv.ipv.pt/PaginasPessoais/cseabra/Docs/T%C9CNICAS%20DE%20SECRETARIADO/Aulas/Ponto%203%20Escrever%20e%20Responder/3.2%20diversos%20tipos%20de%20correpond%EAncia%20e%20quando%20us%E1-los.doc
http://www.emprego.universia.pt/contenidosHTML/el_curriculum/carta_de_presentacion.jsp