diff --git a/owlps-positioning/Makefile b/owlps-positioning/Makefile
index a515ffe..afc3f22 100644
--- a/owlps-positioning/Makefile
+++ b/owlps-positioning/Makefile
@@ -58,6 +58,7 @@ OBJ_LIST = \
 	measurement.o \
 	request.o \
 	calibrationrequest.o \
+	resultlist.o \
 	result.o \
 	minmax.o \
 	interlinknetworks.o \
@@ -177,6 +178,10 @@ $(OBJ_DIR)/calibrationrequest.o: \
 	$(OBJ_DIR)/request.o \
 	$(OBJ_DIR)/referencepoint.o \
 	$(OBJ_DIR)/direction.o
+$(OBJ_DIR)/result.o: \
+	$(OBJ_DIR)/request.o
+$(OBJ_DIR)/resultlist.o: \
+	$(OBJ_DIR)/result.o
 $(OBJ_DIR)/textfilereader.o: \
 	$(OBJ_DIR)/posexcept.o
 $(OBJ_DIR)/csvfilereader.o: \
@@ -208,10 +213,12 @@ $(OBJ_DIR)/input.o: \
 	$(OBJ_DIR)/stock.o
 $(OBJ_DIR)/outputterminal.o: \
 	$(SRC_DIR)/outputmedium.hh \
+	$(OBJ_DIR)/resultlist.o \
 	$(OBJ_DIR)/result.o
 $(OBJ_DIR)/outputcsv.o: \
 	$(SRC_DIR)/outputmedium.hh \
 	$(OBJ_DIR)/textfilewriter.o \
+	$(OBJ_DIR)/resultlist.o \
 	$(OBJ_DIR)/result.o
 $(OBJ_DIR)/output.o: \
 	$(OBJ_DIR)/outputterminal.o \
@@ -250,6 +257,7 @@ $(OBJ_DIR)/positioning.o: \
 	$(OBJ_DIR)/frbhmbasic.o \
 	$(OBJ_DIR)/interlinknetworks.o \
 	$(OBJ_DIR)/radar.o \
+	$(OBJ_DIR)/resultlist.o \
 	$(OBJ_DIR)/output.o \
 	$(OBJ_DIR)/configuration.o \
 	$(OBJ_DIR)/posexcept.o
diff --git a/owlps-positioning/TODO b/owlps-positioning/TODO
index 2891c6c..bae3bfb 100644
--- a/owlps-positioning/TODO
+++ b/owlps-positioning/TODO
@@ -25,14 +25,6 @@
    ° Compositions : devraient être représentées par des attributs
    normaux.
 
-- Positioning
-   ° Pour une requête, la sortie des résultats de tous les algos
-   devrait se faire simultanément sur le medium de sortie, ce qui
-   permettrait par exemple de créer un tableau pour l'affichage CSV
-   (et peut-être d'optimiser les requêtes d'insertion dans la
-   BDD). Cela implique de modifier les interfaces de Output (write()
-   devra prendre un vector<Result>) et des différents OutputMedium.
-
 - Building
    Dans le destructeur, vérifier qu'il faut bien supprimer les Area et
    les Waypoint. Si oui, faut-il aussi les enlever des listes dans
diff --git a/owlps-positioning/src/cartographyalgorithm.cc b/owlps-positioning/src/cartographyalgorithm.cc
index 9895ce6..0610e2a 100644
--- a/owlps-positioning/src/cartographyalgorithm.cc
+++ b/owlps-positioning/src/cartographyalgorithm.cc
@@ -5,5 +5,5 @@
 Result CartographyAlgorithm::compute(const Request &request)
 {
   Point3D position(select_point(request)) ;
-  return Result(&request, position, name) ;
+  return Result(position, name) ;
 }
diff --git a/owlps-positioning/src/frbhmbasic.cc b/owlps-positioning/src/frbhmbasic.cc
index e7616f2..d3fba65 100644
--- a/owlps-positioning/src/frbhmbasic.cc
+++ b/owlps-positioning/src/frbhmbasic.cc
@@ -12,7 +12,7 @@ Result FRBHMBasic::compute(const Request &_request)
   compute_ap_distance_circles() ;
   Point3D position(multilaterate_2d(closest_in_ss->get_z())) ;
 
-  return Result(request, position, name) ;
+  return Result(position, name) ;
 }
 
 
diff --git a/owlps-positioning/src/multilaterationalgorithm.cc b/owlps-positioning/src/multilaterationalgorithm.cc
index 867318d..3dae101 100644
--- a/owlps-positioning/src/multilaterationalgorithm.cc
+++ b/owlps-positioning/src/multilaterationalgorithm.cc
@@ -58,7 +58,7 @@ Result MultilaterationAlgorithm::compute(const Request &_request)
   compute_ap_distance_circles() ;
   Point3D position(multilaterate()) ;
 
-  return Result(request, position, name) ;
+  return Result(position, name) ;
 }
 
 
diff --git a/owlps-positioning/src/output.cc b/owlps-positioning/src/output.cc
index ab1743c..75eb29d 100644
--- a/owlps-positioning/src/output.cc
+++ b/owlps-positioning/src/output.cc
@@ -78,9 +78,9 @@ void Output::initialise_output_csv()
 }
 
 
-void Output::write(const Result &result) const
+void Output::write(const ResultList &results) const
 {
   for (vector<OutputMedium*>::const_iterator i = output_media.begin() ;
        i != output_media.end() ; ++i)
-    (*i)->write(result) ;
+    (*i)->write(results) ;
 }
diff --git a/owlps-positioning/src/output.hh b/owlps-positioning/src/output.hh
index fbfa7fe..5884f07 100644
--- a/owlps-positioning/src/output.hh
+++ b/owlps-positioning/src/output.hh
@@ -2,7 +2,7 @@
 #define _OWLPS_POSITIONING_OUTPUT_HH_
 
 class OutputMedium ;
-class Result ;
+class ResultList ;
 
 #include <vector>
 
@@ -27,7 +27,7 @@ public:
 
   /** @name Operations */
   //@{
-  void write(const Result &result) const ;
+  void write(const ResultList &results) const ;
   //@}
 } ;
 
diff --git a/owlps-positioning/src/outputcsv.cc b/owlps-positioning/src/outputcsv.cc
index 667e85a..e83b9bf 100644
--- a/owlps-positioning/src/outputcsv.cc
+++ b/owlps-positioning/src/outputcsv.cc
@@ -1,5 +1,6 @@
 #include "outputcsv.hh"
 #include "request.hh"
+#include "resultlist.hh"
 #include "mobile.hh"
 
 #include <sstream>
@@ -15,7 +16,23 @@ const string OutputCSV::result_to_csv(const Result &result)
 {
   ostringstream csv_line ;
 
-  const Request *const request = result.get_request() ;
+  csv_line << result.get_algorithm() ;
+
+  Point3D position = result.get_position() ;
+  csv_line
+      << ';' << position.get_x()
+      << ';' << position.get_y()
+      << ';' << position.get_z() ;
+
+  return csv_line.str() ;
+}
+
+
+const string OutputCSV::results_to_csv(const ResultList &results)
+{
+  ostringstream csv_line ;
+
+  const Request *const request = results.get_request() ;
   if (request != NULL)
     {
       if (request->get_mobile() != NULL)
@@ -27,14 +44,10 @@ const string OutputCSV::result_to_csv(const Result &result)
   else
     csv_line << ";;;" ;
 
-  csv_line << ';' << result.get_algorithm() ;
+  const vector<Result> &res = results.get_results() ;
+  for (vector<Result>::const_iterator r = res.begin() ; r != res.end() ;
+       ++r)
+    csv_line << ';' << result_to_csv(*r) ;
 
-  Point3D position = result.get_position() ;
-  csv_line
-      << ';' << position.get_x()
-      << ';' << position.get_y()
-      << ';' << position.get_z() ;
-
-  csv_line << '\n' ;
   return csv_line.str() ;
 }
diff --git a/owlps-positioning/src/outputcsv.hh b/owlps-positioning/src/outputcsv.hh
index 6dda9bf..1a3b0dc 100644
--- a/owlps-positioning/src/outputcsv.hh
+++ b/owlps-positioning/src/outputcsv.hh
@@ -4,10 +4,10 @@
 #include "outputmedium.hh"
 #include "textfilewriter.hh"
 
-/// Writes a result to a CSV file
+/// Writes results to a CSV file
 /**
  * CSV format is:
- *   Mobile_MAC;Timestamp;X;Y;Z
+ *   Mobile_MAC;Timestamp;Algorithm1;X;Y;Z;…;AlgorithmN;X;Y;Z
  */
 class OutputCSV: public OutputMedium
 {
@@ -15,12 +15,14 @@ protected:
   TextFileWriter file ;
 
   const std::string result_to_csv(const Result &result) ;
+  const std::string results_to_csv(const ResultList &results) ;
 
 public:
   OutputCSV(const std::string &filename):
     file(filename) {}
 
   void write(const Result &result) ;
+  void write(const ResultList &results) ;
 } ;
 
 
@@ -30,7 +32,13 @@ public:
 
 inline void OutputCSV::write(const Result &result)
 {
-  file.write_text(result_to_csv(result)) ;
+  file.write_text(result_to_csv(result) + '\n') ;
+}
+
+
+inline void OutputCSV::write(const ResultList &results)
+{
+  file.write_text(results_to_csv(results) + '\n') ;
 }
 
 
diff --git a/owlps-positioning/src/outputmedium.hh b/owlps-positioning/src/outputmedium.hh
index e162afa..915ed55 100644
--- a/owlps-positioning/src/outputmedium.hh
+++ b/owlps-positioning/src/outputmedium.hh
@@ -1,7 +1,8 @@
 #ifndef _OWLPS_POSITIONING_OUTPUTMEDIUM_HH_
 #define _OWLPS_POSITIONING_OUTPUTMEDIUM_HH_
 
-#include "result.hh"
+class Result ;
+class ResultList ;
 
 /// Super class of all output media
 /**
@@ -18,6 +19,7 @@ public:
   /** @name Operations */
   //@{
   virtual void write(const Result &result) = 0 ;
+  virtual void write(const ResultList &results) = 0 ;
   //@}
 } ;
 
diff --git a/owlps-positioning/src/outputterminal.cc b/owlps-positioning/src/outputterminal.cc
index 758508e..088366a 100644
--- a/owlps-positioning/src/outputterminal.cc
+++ b/owlps-positioning/src/outputterminal.cc
@@ -1,4 +1,5 @@
 #include "outputterminal.hh"
+#include "resultlist.hh"
 
 
 
@@ -6,3 +7,10 @@ void OutputTerminal::write(const Result &result)
 {
   output_stream << result << '\n' ;
 }
+
+
+
+void OutputTerminal::write(const ResultList &results)
+{
+  output_stream << results << '\n' ;
+}
diff --git a/owlps-positioning/src/outputterminal.hh b/owlps-positioning/src/outputterminal.hh
index d5d58e4..7fb0a08 100644
--- a/owlps-positioning/src/outputterminal.hh
+++ b/owlps-positioning/src/outputterminal.hh
@@ -16,6 +16,7 @@ public:
     output_stream(_output_stream) {}
 
   void write(const Result &result) ;
+  void write(const ResultList &results) ;
 } ;
 
 #endif // _OWLPS_POSITIONING_OUTPUTTERMINAL_HH_
diff --git a/owlps-positioning/src/positioning.cc b/owlps-positioning/src/positioning.cc
index 726ad30..52844a2 100644
--- a/owlps-positioning/src/positioning.cc
+++ b/owlps-positioning/src/positioning.cc
@@ -4,6 +4,7 @@
 #include "frbhmbasic.hh"
 #include "interlinknetworks.hh"
 #include "radar.hh"
+#include "resultlist.hh"
 #include "configuration.hh"
 #include "posexcept.hh"
 #include "stock.hh"
@@ -86,11 +87,10 @@ void Positioning::loop()
       if (! request)
         continue ;
 
+      ResultList results(&request) ;
       for (algo = algorithms.begin() ; algo != algorithms.end() ;
            ++algo)
-        {
-          Result res = (*algo)->compute(request) ;
-          output.write(res) ;
-        }
+        results.add((*algo)->compute(request)) ;
+      output.write(results) ;
     }
 }
diff --git a/owlps-positioning/src/realposition.cc b/owlps-positioning/src/realposition.cc
index 144db02..98d7281 100644
--- a/owlps-positioning/src/realposition.cc
+++ b/owlps-positioning/src/realposition.cc
@@ -14,8 +14,8 @@ Result RealPosition::compute(const Request &request)
       Point3D *coordinates =
         static_cast<Point3D*>(
           calibration_request->get_reference_point()) ;
-      return Result(&request, *coordinates, name) ;
+      return Result(*coordinates, name) ;
     }
 
-  return Result(&request, name) ;
+  return Result(name) ;
 }
diff --git a/owlps-positioning/src/result.cc b/owlps-positioning/src/result.cc
index 0929e15..a3f3ea3 100644
--- a/owlps-positioning/src/result.cc
+++ b/owlps-positioning/src/result.cc
@@ -13,7 +13,6 @@ const Result& Result::operator=(const Result &source)
 
   algorithm = source.algorithm ;
   position = source.position ;
-  request = source.request ;
 
   return *this ;
 }
@@ -23,20 +22,15 @@ bool Result::operator==(const Result &source) const
 {
   return
     algorithm == source.algorithm &&
-    position == source.position &&
-    request == source.request ;
+    position == source.position ;
 }
 
 
 
 std::ostream& operator<<(std::ostream &os, const Result &r)
 {
-  if (r.request == NULL)
-    os << "For an unknown request, the " ;
-  else
-    os << "For the following request: " << *(r.request)  << "\nThe " ;
   os
-      << "result of the algorithm " << r.algorithm
+      << "The result of the algorithm " << r.algorithm
       << " is: " << r.position ;
   return os ;
 }
diff --git a/owlps-positioning/src/result.hh b/owlps-positioning/src/result.hh
index 951eaaa..13783a1 100644
--- a/owlps-positioning/src/result.hh
+++ b/owlps-positioning/src/result.hh
@@ -1,8 +1,6 @@
 #ifndef _OWLPS_POSITIONING_RESULT_HH_
 #define _OWLPS_POSITIONING_RESULT_HH_
 
-class Request ;
-
 #include "point3d.hh"
 
 #include <string>
@@ -12,24 +10,19 @@ class Result
 {
 protected:
   Point3D position ;
-  Request *request ;
   std::string algorithm ;
 
 public:
-  Result(const Request *_request = NULL,
-         const std::string &_algorithm = "UnknownAlgorithm"):
-    request(const_cast<Request*>(_request)), algorithm(_algorithm) {}
-  Result(const Request *_request, const Point3D &_position,
-         const std::string &_algorithm):
-    position(_position), request(const_cast<Request*>(_request)),
+  Result(const std::string &_algorithm = "UnknownAlgorithm"):
     algorithm(_algorithm) {}
+  Result(const Point3D &_position, const std::string &_algorithm):
+    position(_position), algorithm(_algorithm) {}
   ~Result(void) {}
 
   /** @name Read accessors */
   //@{
   const std::string& get_algorithm(void) const ;
   const Point3D& get_position(void) const ;
-  const Request* get_request(void) const ;
   //@}
 
   /** @name Operators */
@@ -60,12 +53,6 @@ inline const Point3D& Result::get_position() const
 }
 
 
-inline const Request* Result::get_request() const
-{
-  return request ;
-}
-
-
 
 /* *** Operators *** */
 
diff --git a/owlps-positioning/src/resultlist.cc b/owlps-positioning/src/resultlist.cc
new file mode 100644
index 0000000..a9492a5
--- /dev/null
+++ b/owlps-positioning/src/resultlist.cc
@@ -0,0 +1,54 @@
+#include "resultlist.hh"
+#include "request.hh"
+
+using namespace std ;
+
+
+
+/* *** Constructors *** */
+
+
+ResultList::~ResultList()
+{
+  results.clear() ;
+}
+
+
+
+/* *** Operators *** */
+
+
+const ResultList& ResultList::operator=(const ResultList &source)
+{
+  if (this == &source)
+    return *this ;
+
+  request = source.request ;
+  results = source.results ;
+
+  return *this ;
+}
+
+
+bool ResultList::operator==(const ResultList &source) const
+{
+  return
+    request == source.request &&
+    results == source.results ;
+}
+
+
+
+ostream& operator<<(ostream &os, const ResultList &r)
+{
+  if (r.request == NULL)
+    os << "For an unknown request:\n" ;
+  else
+    os << "For the following request: " << *(r.request) << '\n' ;
+
+  vector<Result>::const_iterator res ;
+  for (res = r.results.begin() ; res != r.results.end() ; ++res)
+    os << *res << '\n' ;
+
+  return os ;
+}
diff --git a/owlps-positioning/src/resultlist.hh b/owlps-positioning/src/resultlist.hh
new file mode 100644
index 0000000..63a453d
--- /dev/null
+++ b/owlps-positioning/src/resultlist.hh
@@ -0,0 +1,76 @@
+#ifndef _OWLPS_POSITIONING_RESULTLIST_HH_
+#define _OWLPS_POSITIONING_RESULTLIST_HH_
+
+class Request ;
+#include "result.hh"
+
+#include <vector>
+#include <ostream>
+
+class ResultList
+{
+protected:
+  Request *request ;
+  std::vector<Result> results ;
+
+public:
+  ResultList(const Request *_request = NULL,
+             const std::vector<Result> &_results = std::vector<Result>()):
+    request(const_cast<Request*>(_request)), results(_results) {}
+  ResultList(const ResultList &source):
+    request(source.request), results(source.results) {}
+  ~ResultList(void) ;
+
+  /** @name Read accessors */
+  //@{
+  const Request* get_request(void) const ;
+  const std::vector<Result>& get_results(void) const ;
+  //@}
+
+  /** @name Write accessors */
+  //@{
+  void add(const Result &res) ;
+  //@}
+
+  /** @name Operators */
+  //@{
+  const ResultList& operator=(const ResultList &source) ;
+  bool operator==(const ResultList &source) const ;
+  bool operator!=(const ResultList &source) const ;
+  //@}
+
+  /// Displays a ResultList
+  friend std::ostream& operator<<(std::ostream &os,
+                                  const ResultList &r) ;
+} ;
+
+
+
+/* *** Read accessors *** */
+
+
+inline const Request* ResultList::get_request() const
+{
+  return request ;
+}
+
+
+inline const std::vector<Result>& ResultList::get_results(void) const
+{
+  return results ;
+}
+
+
+
+
+/* *** Write accessors *** */
+
+
+inline void ResultList::add(const Result &res)
+{
+  results.push_back(res) ;
+}
+
+
+
+#endif // _OWLPS_POSITIONING_RESULTLIST_HH_