diff --git a/OSS-2017/03-architecture.tex b/OSS-2017/03-architecture.tex
index 33986bc..868c1eb 100644
--- a/OSS-2017/03-architecture.tex
+++ b/OSS-2017/03-architecture.tex
@@ -2,6 +2,8 @@
 
 %TODO: Kanashiro
 
+The SPB platform was deployed in 7 virtual machines with different functions,
+as we can see in Figure \ref{fig:architecture}.
 
 \begin{figure}[hbt]
   \centering
@@ -10,17 +12,28 @@
   \label{fig:architecture}
 \end{figure}
 
-O ambiente é composto por 7 máquinas com funções distintas:
-
-\begin{itemize}
-
-\item Reverseproxy: Proxy reverso
-\item Integration: Segundo proxy reverso, Repositórios Git, Listas de email e Backend final de email
-\item Email: Relay de email
-\item Social: Servidor de rede social Noosfero
-\item Database: Servidor de banco de dados PostgreSQL
-\item Mezuro: Servidor de análise de código Mezuro
-\item Monitor: Monitoramento de informações dos outros serviços
-
-\end{itemize}
-
+The \textit{reverseproxy} handles the HTTP requests and redirects them to the
+\textit{integration}, the \textit{email} sends and receives e-mails on behalf
+of the platform and the \textit{monitor} keeps the entire environment tracked.
+These three \textit{VMs} mentioned - \textit{reverseproxy}, \textit{email} and
+\textit{monitor} - are accessible via Internet and the other ones are only
+available in the local network created between them.
+
+\textit{Integration} works as a second layer of proxy beneath
+\textit{reverseproxy}, any request to the platform will be handled by it. The
+Colab service provides interface, authentication and search engine integration
+among all the services. When a request is received to a specific service,
+Colab authenticates the user in the target tool, sends the request and makes a
+visual transformation in the HTML page which is the content of the response.
+Another user-oriented feature is the integrated search engine, when the user
+want to find something in the platform Colab will perform the search in the
+whole databases. Colab itself provides a web interface for GNU Mailman and we
+have two others integrated tools in \textit{integration}: Gitlab and Prezento.
+Gitlab provides web interface for Git repositories and issues tracker, and
+Prezento is a front-end for source code static analysis.
+
+The source code static analysis is performed by \textit{mezuro}. It runs some
+static analysis tools on source code stored in repository and provide this data
+to Prezento. A social network and CMS (Content Manager System) is provided by
+Noosfero in \textit{social}, and the databases of all tools with a cache
+service are in \textit{database}.
--
libgit2 0.21.2