codes of many languages
https://gpcardim.files.wordpress.com/2012/06/apresentacao_c_oficial.pdf http://www.inf.pucrs.br/~pinho/LaproI/Historico/Historico.htm http://linguagemc.com.br/breve-historia-da-linguagem-c/
Modelagem http://www.devmedia.com.br/engenharia-de-software-2-tecnicas-para-levantamento-de-requisitos/9151
C/parte 2
http://www.linhadecodigo.com.br/artigo/489/linguagem-de-programacao.aspx
Ruby http://rosettacode.org/wiki/Permutations/Derangements#Ruby https://www.ruby-lang.org/pt/about/ http://stackoverflow.com/questions/14431582/generate-all-possibles-combinations-of-an-array-with-a-length-within-a-given-ran http://blog.lucascaton.com.br/2013/06/26/contar-a-frequencia-de-objetos-em-um-array-usando-ruby/
http://repository.root-me.org/R%C3%A9seau/EN%20-%20Practical%20packet%20analysis%20-%20Wireshark.pdf https://sharkfest.wireshark.org/assets/presentations/B5%20-%20TCP%20Analysis%20-%20First%20Steps.pdf http://www.soc.napier.ac.uk/~40001507/CSN11102/Lab5.pdf
http://www.les.inf.puc-rio.br/wiki/images/e/ef/Aula02-diagrama_sequencia.pdf http://www.dsc.ufcg.edu.br/~jacques/cursos/map/html/uml/diagramas/interacao/sequencia.htm
https://www.reddit.com/r/PopcornTimeCE/comments/3xa881/downloads/